Document:

<PAGE>

                           AMENDMENT NUMBER THREE TO
                      THE 1993 NATIONAL STEEL CORPORATION
                   NON-EMPLOYEE DIRECTORS' STOCK OPTION PLAN

          Amendment made as of this 14/th/ day of February, 2000 to the 1993
National Steel Corporation Non-Employee Directors' Stock Option Plan (the
"Plan").

                                  WITNESSETH:

          WHEREAS, National Steel Corporation, a Delaware corporation (the
"Company") has established the Plan;

          WHEREAS, the Company maintains the Plan to assist it in attracting and
retaining the services of certain non-employee directors by providing such
persons with the option to purchase shares of the Class B Common Stock of the
Company, $.01 par value;

          WHEREAS, the Company wishes to amend the Plan; and

          WHEREAS, the Board (as defined in Section 2.01.3 of the Plan) has the
authority under Section 10.01 of the Plan to amend the Plan from time to time.

          NOW THEREFORE, the Plan is hereby amended, effective as of February
14, 2000, as follows:

1.   Section 6.02(v) is hereby amended by deleting the last sentence thereof and
     replacing it with the following:

          "In addition, each Participant shall receive, upon each
          anniversary of such Participant becoming a director of the
          Company and not subject to the discretion of any Person or
          Persons, an Option under the Plan relative to the purchase
          of 1,000 shares (subject to the provision of Section 8)."

2.   Except as herein modified and amended, the terms of the Plan shall remain
     unchanged and in full force and effect.<PAGE>

                              AMENDMENT NO. 2 TO
                       NO. 1 CONTINUOUS GALVANIZING LINE
                            TURNKEY ENGINEERING AND
                             CONSTRUCTION CONTRACT

     This Amendment No. 2 ("AMENDMENT") made this 22nd day of June, 1999 by and
between National Steel Corporation, Great Lakes Division, a Delaware corporation
with its office at 4100 Edison Lakes Parkway, Mishawaka, Indiana 46545
("NATIONAL") and NKK Steel Engineering, Inc., a Delaware corporation with its
office at 910 Sheraton Drive, Suite 400, Mars, Pennsylvania 16046-9414
("CONTRACTOR").

                                   RECITALS

     A. NATIONAL and CONTRACTOR are parties to the No. 1 Continuous Galvanizing
Line Turnkey Engineering and Construction Contract dated as of October 23, 1998,
as amended by Amendment No. 1 dated as of March 19, 1999 (together, the
"AGREEMENT").

     B. NATIONAL and CONTRACTOR have agreed that the AGREEMENT should be further
amended.

     NOW, THEREFORE, in consideration of the mutual covenants and agreements
contained herein, and for other good and valuable consideration, the receipt and
sufficiency of which are hereby acknowledged, the parties hereto, intending to
be legally bound, hereby agree as follows:

1.   Definitions.  All capitalized terms, which are not otherwise defined
     -----------
herein, shall have the meanings given to them in the AGREEMENT.

2.   Amendment of Section 6. Section 6 of the AGREEMENT is hereby amended by
     ----------------------
adding the following as a new Section 6.5:

     "6.5 Bonus for Early Completion. In the event that the HOT RUN COMMENCEMENT
          --------------------------
     occurs prior to the HOT RUN COMMENCEMENT DEADLINE, then NATIONAL agrees to
     pay to CONTRACTOR, a bonus (the "COMPLETION BONUS") determined in
     accordance with the requirements, and subject to the conditions, set forth
     below :

     (i)  The amount of the COMPLETION BONUS shall be equal to $75,000 times the
          lesser of (a) the number of BONUS ELIGIBLE DAYS (as hereinafter
          defined), and (b) 30.

     (ii) The COMPLETION BONUS shall be due and payable as follows:

               (A) 50% of the COMPLETION BONUS shall be due and payable within
               thirty (30) days after NATIONAL's receipt of CONTRACTOR's invoice
               for such amount, which invoice shall be issued by CONTRACTOR no
               earlier than the occurrence of the HOT RUN COMMENCEMENT;

               (B) 50% of the COMPLETION BONUS shall be due and payable within
               thirty (30) days after NATIONAL's receipt of CONTRACTOR's invoice
               for such amount, which invoice shall be issued by CONTRACTOR no
<PAGE>

               earlier than the date on which the Certificate of Substantial
               Completion has been issued by CONTRACTOR and countersigned by
               National pursuant to Section 15.1(iv) of the AGREEMENT; and

               (C) Amounts payable by NATIONAL to CONTRACTOR pursuant to
               Sections 6.5(ii)(A) and (B) above shall not (x) be required to be
               repaid by CONTRACTOR to NATIONAL under any circumstances, or (y)
               be subject to NATIONAL's right to withhold pursuant to Section
               35.7 of this AGREEMENT.

     (iii) In the event that a COMPLETION BONUS is paid to CONTRACTOR pursuant
           to this Section 6.5, then the SUBSTANTIAL COMPLETION DEADLINE shall
           be moved forward one day for each BONUS ELIGIBLE DAY (so that, for
           example, if there are 5 BONUS ELIGIBLE DAYS, the SUBSTANTIAL
           COMPLETION DEADLINE shall be 22 months and 2 days from the date of
           the CONTRACT).

     (iv)  In order to induce NATIONAL to enter into this AMENDMENT, CONTRACTOR
           hereby affirms and agrees that it shall not, in an effort to expedite
           the HOT RUN COMMENCEMENT, (i) reduce the time period allotted for the
           No Load Test or Cold Run Test in the No. 1 CGL Overall Schedule, as
           set forth in the AS SOLD SPECIFICATIONS, or (ii) otherwise modify,
           amend or depart from the SPECIFICATIONS in its performance of the
           WORK, without in either case, the prior written consent of NATIONAL.
           It is understood and agreed by CONTRACTOR that it will continue to be
           liable to perform the WORK in accordance with the SPECIFICATIONS and
           the other requirements of the AGREEMENT.

     (v)   As used herein the term "BONUS ELIGIBLE DAY" shall mean each calendar
           day (if any) by which the HOT RUN COMMENCEMENT precedes the HOT RUN
           COMMENCEMENT DEADLINE.

     (vi)  In order for a COMPLETION BONUS to be payable hereunder, the HOT RUN
           COMMENCEMENT must actually take place on or before the HOT RUN
           COMMENCEMENT DEADLINE (as currently defined in Section 6.4 of the
           AGREEMENT). Except as specifically set forth in the next succeeding
           sentence, any provision of the AGREEMENT which provides for the
           deemed occurrence of the HOT RUN COMMENCEMENT or for an extension of
           the schedule for performance of the WORK, including the HOT RUN
           COMMMENCEMENT DEADLINE (whether due to an act of FORCE MAJEURE, an
           act of NATIONAL or otherwise) shall not be applicable.
           Notwithstanding the foregoing, in the event that the HOT RUN
           COMMENCEMENT would have occurred but for the fact that NATIONAL
           failed to supply the steel coils necessary for the Hot Run Test,
           then, for the sole purpose of determining CONTRACTOR's entitlement to
           a COMPLETION BONUS, the HOT RUN COMMENCEMENT shall be deemed to have
           occurred on the date that all other conditions for the HOT RUN
           COMMENCEMENT have been satisfied by CONTRACTOR.

3.   Calculation of Liquidated Damages and BONUS ELIGIBLE DAYS. For purposes of
     ----------------------------------------------------------
determining (i) the number of BONUS ELIGIBLE DAYS pursuant to Section 6.5(v) and
(ii)

                                       2
<PAGE>

CONTRACTOR's liability for liquidated damages pursuant to Section 6.4 and
34.12, the number of calendar days, and not the number of hours, shall be
utilized. This principle is illustrated by the following examples:

     (a) The HOT RUN COMMENCEMENT DEADLINE is April 23, 2000. If the HOT RUN
         COMMENCEMENT takes place at 11:30 p.m. on April 22, 2000, then there
         would be one BONUS ELIGIBLE DAY; and

     (b) The HOT RUN COMMENCEMENT DEADLINE is April 23, 2000. If the HOT RUN
         COMMENCEMENT takes place at 12:30 a.m. on May 1, 2000, then one day of
         liquidated damages would be payable by CONTRACTOR pursuant to Section
         6.4 of the AGREEMENT.

4.       No Other Changes. Except as specifically provided for in this
         ----------------
AMENDMENT, the terms and conditions of the AGREEMENT and other CONTRACT
DOCUMENTS shall remain unchanged and in full force and effect.

IN WITNESS WHEREOF, the parties have executed this Amendment as of the date
first set forth above.

                              NATIONAL STEEL CORPORATION

                              By: /s/ Ronald J. Werhnyak
                                  ----------------------------------------------
                              Title: Vice President, General Counsel & Secretary
                                     -------------------------------------------

                              NKK STEEL ENGINEERING, INC.

                              By: /s/ Masayuki Ueta
                                  ----------------------------------------------

                              Title: Chairman & CEO
                                     -------------------------------------------

                                       3<PAGE>

                     STEEL SLAB PRODUCTS SUPPLY AGREEMENT

                                by and between

                                NKK CORPORATION

                                      and

                          NATIONAL STEEL CORPORATION

                           DATED: February 16, 2000
<PAGE>

                              TABLE OF  CONTENTS

<TABLE>
<S>                                                                       <C>
ARTICLE I  DEFINITIONS                                                     1
     Section 1.1  Definitions                                              1

ARTICLE II  PURCHASE AND SALE OF STEEL SLAB PRODUCTS; PRICE                3
     Section 2.1  Purchase and Sale of Steel Slab Products.                3
     Section 2.2  Price                                                    3

ARTICLE III  ORDERS; QUANTITY; CONFIRMATION; TERMS AND
CONDITIONS OF SALE                                                         3
     Section 3.1  Order for Steel Slab Products; Quantity.                 3
     Section 3.2  Confirmations                                            3
     Section 3.3  Terms and Conditions of Sale.                            4

ARTICLE IV  USE OF TRADING COMPANY                                         4
     Section 4.1  Use of Trading Company                                   4

ARTICLE V  COMMUNICATION TEAM                                              5
     Section 5.1  Communication Team                                       5

ARTICLE VI  REPRESENTATIONS AND WARRANTIES OF NKK                          5
     Section 6.1  Representations and Warranties of NKK                    5

ARTICLE VII  TERM AND TERMINATION                                          5
     Section 7.1  Term.                                                    5
     Section 7.2  Termination.                                             5

ARTICLE VIII DELIVERY; MARKING AND DOCUMENTATION REQUIREMENTS              6
     Section 8.1  Delivery                                                 6
     Section 8.2  Marking and Documentation Requirements                   6

ARTICLE IX FORCE MAJEURE                                                   6
     Section 9.1  Force Majeure.                                           6

ARTICLE X  INTELLECTUAL PROPERTY MATTERS                                   7
     Section 10.1 Patent Indemnity.                                        7

ARTICLE XI  MISCELLANEOUS                                                  8
     Section 11.1 Assignment.                                              8
     Section 11.2 Notice.                                                  8
     Section 11.3 Amendment.                                               9
     Section 11.4 Non-Waiver.                                              9
     Section 11.5 Governing Law                                            9
     Section 11.6 Exhibits                                                 9
     Section 11.7 Captions                                                 9
     Section 11.8 Counterparts                                            10
</TABLE>
<PAGE>

EXHIBIT A - ESTIMATED QUANTITIES
EXHIBIT B - PRICE FORMULA
EXHIBIT C - CONFIRMATION
EXHIBIT D - TERMS AND CONDITIONS OF SALE
<PAGE>

                     STEEL SLAB PRODUCTS SUPPLY AGREEMENT

     THIS STEEL SLAB PRODUCTS SUPPLY AGREEMENT, made as of the 16th day of
February, 2000, is by and between NKK CORPORATION, a Japanese corporation,
having its principal office located at 1-1-2 Marunouichi, Chiyoda-Ku, Toyko 100-
8202 Japan, and NATIONAL STEEL CORPORATION, a Delaware corporation having its
principal office at 4100 Edison Lakes Parkway, Mishawaka, Indiana  46545-3440.
(National and NKK are sometimes referred to herein individually as a "Party" and
collective as the "Parties").

                                  WITNESSETH:

     WHEREAS, National desires to obtain from NKK a supply of  Steel Slab
Products; and

     WHEREAS, NKK is willing to supply such Steel Slab Products to National; and

     WHEREAS, National and NKK wish to enter into this Agreement in order to
establish a framework for the sale of Steel Slab Products by NKK to a Trading
Company and the sale of such Steel Slab Products by the Trading Company to
National.

     NOW THEREFORE, in consideration of the mutual promises herein contained,
and intending to be legally bound hereby, the Parties hereto covenant and agree
as follows:

                                   ARTICLE I
                                  DEFINITIONS

     Section 1.1  Definitions.  For the purposes of this Agreement, including
the Preamble and Recitals hereto,  the following terms shall have the meanings
set forth in this Section 1.1:

     "Agreement" means this Steel Slab Products Supply Agreement, including all
Exhibits attached hereto and any amendments hereto or extensions hereof.

     "Communication Team" has the meaning ascribed to such term in Section 5.1
hereof.

     "Confirmation" has the meaning ascribed to such term in Section 3.1 hereof.

     "Estimated Quantity(ies)" has the meaning ascribed to such term in Section
2.1 hereof.

     "National" means National Steel Corporation, a Delaware corporation.

     "National Trading Company Agreement" means the purchase and sale agreement
between National and the Trading Company pursuant to which the Steel Slab
Products covered by each Confirmation shall be sold by the Trading Company and
purchased by National.
<PAGE>

     "NKK" means NKK Corporation, a Japanese corporation.

     "NKK Trading Company Agreement" means the purchase and sale agreement
between NKK and the Trading Company pursuant to which the Steel Slab Products
covered by each Confirmation shall be sold by NKK and purchased by the Trading
Company.

     "Protocol" means the technical protocol executed by National and NKK which
sets forth the Specifications for the Steel Slab Products as such Protocol may
be amended in writing from time to time by the Parties.

     "Specifications" means the grade, size, chemical composition, dimensional
tolerance, appearance, surface quality, internal quality and other technical
specifications for the Steel Slab Products, as set forth in the Protocol.

     "Steel Slab Products" means prime quality continuous cast carbon steel
slabs produced by NKK and meeting the Specifications.

     "Term" has the meaning ascribed to such term in Section 7.1 hereof.

     "Ton" means a net ton which is equal to 2000 pounds.

     "Trading Company"  means a trading company mutually agreed upon by National
and NKK to purchase the Steel Slab Products from NKK and to resell such Steel
Slab Products to National.

                                  ARTICLE II
                PURCHASE AND SALE OF STEEL SLAB PRODUCTS; PRICE

     Section 2.1  Purchase and Sale of Steel Slab Products. During the Term,
National anticipates that a Trading Company will purchase Tons of Steel Slab
Products in the quantities set forth in Exhibit A (the "Estimated
Quantity(ies)") from NKK for the benefit of and use by National; provided,
however, that the Parties understand and agree that (i) the actual amounts
purchased shall be established during the quarterly negotiations described in
Section 3.1 below; (ii) neither National nor the Trading Company shall have any
liability to NKK if, for any reason, the Estimated Quantity(ies) of Steel Slab
Products is/are not purchased; and (iii) neither NKK nor the Trading Company
shall have any liability to National if, for any reason, the Estimated
Quantity(ies) of Steel Slab Products is/are not produced; provided, further,
however that the Parties will continuously explore the possibility for supplying
additional Steel Slab Products to National in the future. The first shipment of
Steel Slab Products shall be delivered to National in the second (2/nd/) quarter
of the year 2000.

     Section 2.2  Price.  The price per Ton of Steel Slab Products shall be
determined in accordance with the formula set forth in Exhibit B.
<PAGE>

                                  ARTICLE III
         ORDERS; QUANTITY; CONFIRMATION; TERMS AND CONDITIONS OF SALE

     Section 3.1  Order for Steel Slab Products; Quantity.  At least one hundred
twenty (120) days prior to the commencement of each calendar quarter during the
Term, National and NKK shall engage in negotiations to establish the following:

               (i)  The quantities of the Steel Slab Products to be purchased
                    during such quarter on a vessel by vessel basis; and

               (ii) The Specifications for the Steel Slab Products to be
                    purchased during such quarter on a vessel by vessel basis.

     Section 3.2  Confirmations.

               (i)  The price of the Steel Slab Products to be purchased during
each quarter shall be set using the formula set forth in Exhibit B.

               (ii) In the event that the Parties reach agreement on the terms
described above in Section 3.1, the Parties shall evidence such agreement by
executing the form of Confirmation which is attached hereto as Exhibit C (the
"Confirmation"). The Confirmation shall constitute a binding commitment on the
part of NKK to sell to the Trading Company the quantities of Steel Slab Products
specified therein, on the terms and conditions set forth in (1) the
Confirmation, (2) this Agreement and (3) the NKK Trading Company Agreement. In
the event that National and NKK are unable to reach an agreement on all of the
terms described in Section 3.1, then neither Party shall have any liability to
the other Party with respect to the purchase and sale of Steel Slab Products for
such quarter, but the Parties shall nevertheless engage in the negotiations
described above for any subsequent calendar quarters during the remaining
portion of the Term. All Steel Slab Products purchased and sold pursuant to this
Agreement shall conform to this Agreement and to the Specifications set forth in
the Protocol.

     Section 3.3  Terms and Conditions of Sale.  The terms and conditions
applicable to each purchase and sale pursuant to this Agreement shall be those
stated herein, including in the Exhibits attached hereto.  NKK acknowledges that
the National Trading Company Agreement shall contain the terms and conditions of
sale set forth in Exhibit D attached hereto, and such terms and conditions,
together with the other terms and conditions set forth in this Agreement, shall
be implemented through the National Trading Company Agreement and the NKK
Trading Company Agreement.  As between NKK and National, no other terms and
conditions, including, without limitation, those set forth in the purchase and
sales acknowledgment forms of the Parties, shall apply.

                                  ARTICLE IV
                            USE OF TRADING COMPANY

     Section 4.1  Use of Trading Company.  A Trading Company shall be used to
facilitate the purchase of Steel Slab Products by National from NKK, and,
therefore, NKK will
<PAGE>

be selling Steel Slab Products to the Trading Company and not directly to
National. NKK agrees to sell to the Trading Company the quantities of Steel Slab
Products set forth in the Confirmation for such calendar quarter at the prices
set forth in the Confirmation. The Trading Company will in turn resell the Steel
Slab Products to National pursuant to the National Trading Company Agreement.
National agrees to purchase from the Trading Company the quantities of Steel
Slab Products set forth in the Confirmation for such calendar quarter at the
prices set forth in such Confirmation. NKK shall enter into the NKK Trading
Company Agreement with the Trading Company, and National shall enter into the
National Trading Company Agreement with the Trading Company, each such agreement
to contain all appropriate terms and conditions with respect to the sale of the
Steel Slab Products, including, but not limited to, (i) payment terms, (ii)
delivery terms and (iii) shipping requirements. NKK acknowledges and agrees that
National shall have no liability or obligation whatsoever to NKK for any
obligations of the Trading Company under the NKK Trading Company Agreement.
National acknowledges and agrees that NKK shall have no liability or obligation
whatsoever to National for any obligations of the Trading Company under the
National Trading Company Agreement.

                                   ARTICLE V
                              COMMUNICATION TEAM

     Section 5.1  Communication Team.  Each Party agrees to designate a
sufficient number of its personnel to form a team (the "Communication Team") to
discuss and review the details of the quantities, specifications and production
plan for the Steel Slab Products.  The Communication Team shall meet from time
to time to ensure smooth execution and implementation under the Agreement.

                                  ARTICLE VI
                     REPRESENTATIONS AND WARRANTIES OF NKK

     Section 6.1  Representations and Warranties of NKK.  NKK hereby represents
and warrants, for the benefit of both National and the Trading Company, that (i)
all Steel Slab Products sold to a Trading Company hereunder shall be of
merchantable quality and conform in all respects to the Specifications; and (ii)
NKK shall convey good title to the Steel Slab Products to the Trading Company,
free and clear of all liens, mortgages, security interests and other
encumbrances of any kind whatsoever.

                                  ARTICLE VII
                             TERM AND TERMINATION

     Section 7.1  Term.  The term of this Agreement shall commence on the date
first above written and shall continue until December 31, 2000 and thereafter on
a year to year basis,  unless this Agreement is earlier terminated in accordance
with the provisions in Section 7.2 below (the "Term").
<PAGE>

     Section 7.2  Termination.  (a)  This Agreement may be terminated for cause
by either Party:

          (i)   if a material breach hereof occurs and such material breach is
                not cured within thirty (30) days after written notice thereof
                is received from the Party not in breach; or

          (ii)  if the other Party shall become insolvent or unable to pay its
                debts as they mature; or

          (iii) if the other Party makes an assignment for the benefit of
                creditors or consents to the appointment of creditors or
                consents to the appointment of a trustee or a receiver or if a
                proceeding in bankruptcy, receivership, insolvency, any other
                proceeding for the adjustment, composition or extension of the
                other Party's debts or any other similar proceeding is
                instituted with respect to the other Party or the assets or
                property of the other Party.

     (b)  This Agreement may be terminated without cause upon the mutual
agreement of the Parties.

     (c)  This Agreement may be terminated by either Party without cause
effective as of the end of any calendar year if six (6) months prior written
notice is provided to the other Party.

                                 ARTICLE VIII
               DELIVERY; MARKING AND DOCUMENTATION REQUIREMENTS

     Section 8.1  Delivery.  All Steel Slab Products shall be sold FOB Japan to
the Trading Company and shall be delivered through a port or ports specified by
National.

     Section 8.2  Marking and Documentation Requirements.  NKK shall comply with
all marking and documentation requirements set forth in the Protocol.

                                  ARTICLE IX
                                 FORCE MAJEURE

     Section 9.1  Force Majeure.  Each Party shall be excused from performing
hereunder upon the occurrence of an event which affects such Party or its
customer(s) and which is caused in whole or in part by: acts of God, wars,
riots, fires, explosions, breakdowns or accidents; strikes, lockouts or other
labor difficulties; lack or shortages of labor, materials, utilities, energy
sources or transportation facilities; delays of carriers; compliance with
governmental rules, regulations, priorities, allocations or other governmental
requirements; any other like causes; or any other unlike causes beyond such
Party's or its customers' control.  The
<PAGE>

foregoing shall be in addition to and not in limitation of any excuses for
nonperformance available to such Party under the Uniform Commercial Code or any
other applicable law. In the event such Party is excused from performance under
any of the foregoing provisions or applicable law, such Party shall have the
further right, notwithstanding any provision of this Agreement to the contrary,
at its option, to delay individual shipments of Steel Slab Products or to refuse
acceptance thereof, and if the state of Force Majeure continues for more than
thirty (30) days, the Parties shall engage in good faith discussions in an
attempt to resolve such suspended status, including, without limitation, the
possible termination of this Agreement. Notwithstanding the foregoing, the Party
affected by any such Force Majeure shall use commercially reasonable efforts to
mitigate and/or eliminate the effect of such Force Majeure.

                                   ARTICLE X
                         INTELLECTUAL PROPERTY MATTERS

     Section 10.1  Patent Indemnity.  NKK warrants that (1) use of the Steel
Slab Products covered by this Agreement for the purposes for which such  Steel
Slab Products were designed, and (2) performance by NKK pursuant to this
Agreement will not infringe any United States or foreign patent and NKK will, at
its expense, indemnify, defend and hold free and harmless National, its
affiliated corporations, successors and assigns, in respect to any claim, action
or suit, or for any claim arising out of such action or suit, for infringement
of any United States or foreign patent based on the use of the Steel Slab
Products for the purposes for which they were designed or for actively inducing
infringement or for contributory infringement arising out of the performance of
any act by NKK in performing pursuant to this Agreement; provided, however, that
National may be represented in any such action or suit by attorneys of its own
selection at its expense.  In the event that any injunction shall be obtained
against the use of any Steel Slab Products or part thereof by National, NKK, in
addition to its above obligations, shall, at its expense, procure for National
the right to continue using or selling the Steel Slab Products, to modify the
Steel Slab Products to become non-infringing, or replace the Steel Slab Products
with non-infringing goods satisfactory to National.  Notwithstanding the
foregoing, the Parties understand and agree that the patent indemnity set forth
in this Article X shall not apply to the extent that a claim of patent
infringement arises from (1) the processing of the Steel Slab Products by
National or (2) the chemical composition of the Steel Slab Products if such
chemical composition was requested or specified by National and if the Steel
Slab Products actually conform to the chemical composition specified or
requested by National.

                                  ARTICLE XI
                                 MISCELLANEOUS

     Section 11.1  Assignment.  Neither National nor NKK may assign any of its
rights or obligations under this Agreement except with the prior consent of the
other party; provided, however, that either Party may assign this Agreement to a
subsidiary corporation wholly-owned by it without the consent of the other
Party, but the assigning Party shall remain liable under all the provisions of
this Agreement notwithstanding said assignment.
<PAGE>

     Section 11.2  Notice.  Any notices or other communications required or
permitted hereunder or otherwise in connection herewith shall be in writing and
shall be deemed to have been duly given when delivered in person or the next
business day when transmitted by facsimile transmission or on receipt after
dispatch by overnight courier or registered or certified mail, postage prepaid,
addressed, as follows:

            if to NKK:        NKK Corporation
                              1-1-2 Marunouichi, Chiyoda-Ku
                              Toyko 100-8202 Japan
                              Attention: General Manager, Strategic Planning
                              Telecopier No.: 81-3-3214-8412

            with a copy to:   NKK Corporation
                              1-1-2 Marunouichi, Chiyoda-Ku
                              Toyko 100-8202 Japan
                              Attention: Senior Chief Counselor
                              Telecopier No.: 81-3-3214-8428

            if to National:   National Steel Corporation
                              4100 Edison Lakes Parkway
                              Mishawaka, Indiana 46545
                              Attention: Vice President, Strategic Sourcing
                              Telecopier No.: (219) 273-7493

            with a copy to:   National Steel Corporation
                              4100 Edison Lakes Parkway
                              Mishawaka, Indiana 46545
                              Attention:  General Counsel
                              Telecopier No.:  (219) 273-7609

or to such other address as either Party shall have designated by notice in
writing to the other Party.

     Section 11.3  Integration; Amendment.  This Agreement sets forth the entire
agreement and understanding between the Parties as to the subject matter of this
Agreement and any and all prior or contemporaneous proposals, negotiations,
agreements, commitments and representations, oral or written, are merged herein.
This Agreement may not be modified or amended except by means of a writing duly
executed by the Parties subsequent to the date hereof which states that it is
intended to amend this Agreement.

     Section 11.4  Non-Waiver. Neither Party shall be deemed to have waived its
rights under this Agreement or any provisions hereof unless such waiver shall be
in a writing duly executed by the Party to be charged with such waiver. The
failure of either Party to enforce at any time any of the provisions of this
Agreement shall in no way be construed to be a waiver of such provisions, nor in
any way to affect the validity of this Agreement or any part thereof, or the
right of any Party to thereafter enforce each and every such provision. No
waiver of any breach of this Agreement shall be held to be a waiver of any other
or subsequent breach.
<PAGE>

     Section 11.5  Governing Law.  This Agreement and all matters relating to
the performance and subject matter hereof shall be governed by the laws of the
State of New York, without regard to its conflicts of laws provisions.  The
exclusive jurisdiction for the resolution of all disputes relating to this
Agreement shall be the state or federal courts in the district in which New
York, New York is located, and the parties hereto hereby consent to the
jurisdiction of such courts to hear and resolve such disputes.

     Section 11.6  Exhibits.  All of the Exhibits attached hereto are hereby
incorporated by reference and made a part hereof.

     Section 11.7  Captions.  The captions of this Agreement are for convenience
only and shall not control or affect the meaning or construction of any of the
provisions of this Agreement.

     Section 11.8  Counterparts.  This Agreement may be executed in one or more
counterparts, each of which shall be deemed to be an original but all of which
shall constitute but one and the same document.

                 [REMAINDER OF PAGE INTENTIONALLY LEFT BLANK]
<PAGE>

     IN WITNESS WHEREOF, the Parties hereto have duly executed this Steel Slab
Products Supply Agreement the day and year first above written.

                              NKK CORPORATION

                              By:____________________________________
                              Name: Takashi Yamazaki
                              Title: General Manager, Strategic Planning

                              NATIONAL STEEL CORPORATION

                              By:____________________________________
                              Name:__________________________________
                              Title:_________________________________
<PAGE>

                                   EXHIBIT A

                             ESTIMATED QUANTITIES

---------------------------------------------------------------------------
        YEAR           CALENDAR QUARTER                   QUANTITY
---------------------------------------------------------------------------
        2000               2/nd/ Qr.                     40,000 NT
                           3/rd/ Qr.                     80,000 NT
                           4/th/ Qr.                     80,000 NT
---------------------------------------------------------------------------
        2001               1/st/ Qr.                     80,000 NT
                           2/nd/ Qr.                     80,000 NT
                           3/rd/ Qr.                     80,000 NT
                           4/th/ Qr.                     80,000 NT
---------------------------------------------------------------------------
2002 and thereafter        1/st/ Qr.                100,000 - 125,000 NT
 until termination         2/nd/ Qr.                100,000 - 125,000 NT
                           3/rd/ Qr.                100,000 - 125,000 NT
                           4/th/ Qr.                100,000 - 125,000 NT
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<PAGE>

                                   EXHIBIT B

                                 PRICE FORMULA
                                 -------------

I.   Definitions.

     For the purposes of this "Exhibit B", the following words, terms and
phrases shall have the following meanings:

     "Base Price" means, on a net Ton basis for each applicable calendar
quarter, the Quarterly Hot Band Price less the Price Adjustment.

     "DI/DRD Grade Price Premium" shall mean an amount equal to $20 per net Ton.

     "IF Grade Price Premium" shall mean an amount equal to $30 per net Ton.

     "Land Delivery Charge" means, on a net Ton basis during the first calendar
quarter during which deliveries of Steel Slab Products occur pursuant to this
Agreement, the cost to National to ship the Steel Slab Products from the port of
Philadelphia to GLD.

     "Land Delivery Charge Adjustment" means, on a net Ton basis for each
applicable calendar quarter following the first calendar quarter, an adjustment
equal to, as applicable, (i) half of the amount by which the cost to ship the
Steel Slab Products from the port of Philadelphia to GLD exceeds the Land
Delivery Charge, or (ii) half of the amount by which the cost to ship the Steel
Slab Products from the port of Philadelphia to GLD is less than the Land
Delivery Charge.

     "Ocean Delivery Charge" means, on a net ton basis, the aggregate of the
Ocean Delivery Charge Components during the first calendar quarter during which
deliveries of Steel Slab Products occur pursuant to the terms of this Agreement.

     "Ocean Delivery Charge Adjustment" means, on a net Ton basis for each
applicable calendar quarter, an adjustment equal to, as applicable, (i) half of
the amount by which the actual aggregate cost of the Ocean Delivery Charge
Components is more than the Ocean Delivery Charge or (ii) half of the amount by
which the actual aggregate cost of the Ocean Delivery Charge Components is less
than the Ocean Delivery Charge.

     "Ocean Delivery Charge Components" means (i) ocean freight to transport the
Steel Slab Products from Japan to the port of Philadelphia; (ii) ocean
insurance; (iii) interest; (iv) duties; and (v) cost of unloading the Steel Slab
Products to rail at the port of Philadelphia.

     "Price Adjustment" means the average of the Yearly Hot Band Price less the
Slab Price; provided, however, that the Price Adjustment as calculated in each
            --------  -------
applicable calendar quarter shall not be less than $75 per net Ton and shall not
be more than $115 per net Ton.
<PAGE>

     "Quarterly Hot Band Price" means the weighted average of spot prices
(including freight costs therefor) for hot band steel (with hot band steel being
defined as slab to hot mill rolling to direct shipment to a customer) sold by
National during the most recent calendar quarter.

     "Slab Price" means the weighted average cost of slabs purchased by National
from all suppliers other than NKK during the immediately preceding four (4)
calendar quarters.

     "Yearly Hot Band Price" means the weighted average of spot prices
(including freight costs therefor) for hot band steel (with hot band steel being
defined as slab to hot mill rolling to direct shipment to a customer) sold by
National during the most recent four (4) calendar quarters.

II.  Quarterly Determination of Price

     A.   At the time National and NKK commence negotiations, pursuant to
Section 3.1 of the Agreement, regarding the quantities and Specifications of
Steel Slab Products for any calendar quarter, the price for Steel Slab Products
to be delivered for such calendar quarter shall be set using the process set
forth below.

     B.   The Parties acknowledge and agree that the Base Price includes the
Ocean Delivery Charge and the Land Delivery Charge.

     C.   The initial price payable by National to the Trading Company for the
Steel Slab Products during the first calendar quarter during which deliveries
occur shall be as follows:

     For Steel Slab Products other than Steel Slab Products which are of a
DI/DRD grade or IF grade: The Base Price (hereinafter referred to as the "Slab
Products Price").

     For Steel Slab Products which are of a DI/DRD grade: The Base Price + the
DI/DRD Grade Price Premium (hereinafter referred to as the "DI/DRD Slab Price").

     For Steel Slab Products which are of an IF grade:   The Base Price + the IF
Grade Price Premium (hereinafter referred to as the "IF Slab Price").

     D.   The price payable by National to the Trading Company for the Steel
Slab Products during subsequent calendar quarters shall be as follows:

     For Steel Slab Products other than Steel Slab Products which are of a
DI/DRD grade or IF grade: The Slab Products Price +/- the Ocean Delivery Charge
Adjustment +/- the Land Delivery Charge Adjustment.

     For Steel Slab Products which are of a DI/DRD grade: the DI/DRD Slab Price
+/- the Ocean Delivery Charge Adjustment +/- the Land Delivery Charge
Adjustment.
<PAGE>

     For Steel Slab Products which are of an IF grade: the IF Slab Price +/- the
Ocean Delivery Charge Adjustment +/- the Land Delivery Charge Adjustment.

     E.   Anything in this Agreement to the contrary notwithstanding the
following shall apply to each purchase of Steel Slab Products from the Trading
Company by National:

     In no event shall the price of Steel Slab Products other than Steel Slab
Products which are of a DI/DRD grade or an IF grade be less than $205 per net
Ton or more than $260 per net Ton.

     In no event shall the price of Steel Slab Products which are of a DI/DRD
grade be less than $225 per net Ton or more than $280 per net Ton.

     In no event shall the price of Steel Slab Products which are of an IF grade
be less than $235 per net Ton or more than $290 per net Ton.

<PAGE>

                                   EXHIBIT C

                                 CONFIRMATION

     This Confirmation is issued pursuant to the terms of that certain Steel
Slab Products Supply Agreement dated as of __________ ("Agreement") by and
between NKK Corporation ("NKK") and National Steel Corporation ("National").

     (1)  Capitalized terms used in this Confirmation shall have the meanings
given to them in the Agreement.

     (2)  NKK and National hereby agree that during the ____ calendar quarter of
20__, NKK shall sell Steel Slab Products to the Trading Company, and the Trading
Company shall sell Steel Slab Products to National, in the quantity, at the
price and with the specifications set forth below:

          Quantity:           ___ Tons.

          Price:              ____ From the Trading Company to National;
                              $______ per Ton.
                              ____ From NKK to the Trading Company: The price
                         payable by National as set forth above less the Ocean
                         Delivery Charge and the Land Delivery Charge.

          Specifications: As set forth in the technical protocol no. ___
          executed by National and NKK dated ________, attached hereto and made
          a part hereof.

     IN WITNESS WHEREOF, the parties have executed this Confirmation, this ___
day of ________________ ______.

                              NKK Corporation (NKK)

                              By:_________________________________
                              Name: Takashi Yamazaki
                              Title: General Manager, Strategic Planning

                              NATIONAL STEEL CORPORATION

                              By:_________________________________
                              Name:_______________________________
                              Title:______________________________
<PAGE>

                                   EXHIBIT D

                         TERMS AND CONDITIONS OF SALE

1.   TAXES: Except as otherwise required by law or otherwise agreed in writing,
The Trading Company agrees to pay and bear any United States federal, state,
local or foreign taxes, or other governmental charges upon the production,
transportation or sale of the goods supplied hereunder.

2.   IDENTIFICATION: The Trading Company must show complete order number on
packing lists, bills of lading, other supporting documents and packages. Packing
lists must accompany all shipments. National reserves the right to return,
collect, all improperly marked shipments.

3.   DELIVERY: Time of delivery is of the essence of this order. National
reserves the right to refuse any goods and to cancel all or any part of a
shipment if The Trading Company fails to deliver all or any part of the goods in
accordance with the terms of this Agreement. Acceptance of any part of a
shipment shall not bind National to accept future shipments nor deprive it of
the right to return goods already accepted.

4.   NONCONFORMING GOODS: All goods must conform to this Agreement in respect to
quantity, quality and in all other respects and are subject to inspection and
acceptance by National after delivery. National's weight and count shall govern.
The Trading Company is liable for, and shall indemnify, defend and hold harmless
National from and against all losses, damages and liability arising in any way
in connection with any defective or nonconforming goods; in addition, National
shall have the right to return any defective or nonconforming goods at The
Trading Company's expense.

5.   OCCUPATIONAL SAFETY AND HEALTH: The Trading Company represents that all
goods and/or services sold or furnished to National hereunder will comply with
all applicable laws and governmental regulations relating to the occupational
safety and health of employees, including, but not limited to, the United States
federal Occupational Safety and Health Act of 1970 and any rules, regulations,
standards or orders issued thereunder (herein collectively called "Occupational
Safety and Health Requirements"), and The Trading Company agrees to indemnify,
defend and hold harmless National from and against any claims, losses, damages,
fines, penalties, costs and expenses suffered or incurred by National as a
result of any violation or non-compliance with any Occupational Safety and
Health Requirements caused or contributed to by the failure of such goods and/or
services to so comply. The Trading Company agrees that, upon request, it shall
furnish to National any and all information regarding the ingredients of goods
sold or furnished to National hereunder and to comply with any other reasonable
request of National made in connection with the application of any Occupational
Safety and Health Requirements to National, its employees and property.
<PAGE>

6.   GOVERNMENTAL REQUIREMENTS: The Trading Company represents and warrants that
The Trading Company and all goods and/or services sold or furnished to National
hereunder will comply with all applicable United States federal, state and local
statutes, laws, ordinances, codes, rules, regulations, standards, orders or
other governmental requirements of any kind, and any amendments thereto
("Governmental Requirements"), including, without limitation, (1) the
requirements relating to equal employment opportunity contained in or authorized
by Federal Executive Order No. 11246 of September 24, 1965, as amended, and the
rules, regulations and relevant orders of the Secretary of Labor thereunder, (2)
the requirements contained in or authorized by the Fair Labor Standards Act of
1938, as amended, (3) the requirements contained in or authorized by the Federal
Toxic Substances Control Act, and (4) the requirements contained in or
authorized by the Federal Clean Air Act, as amended, or the Federal Water
Pollution Control Act, as amended. Any and all provisions required to be
included in a contract of this type by any applicable Governmental Requirements
are deemed to be incorporated herein. The Trading Company agrees to indemnify,
defend and hold harmless National from and against any claims, losses, damages,
fines, penalties, liabilities, costs and expenses suffered or incurred by
National as the result of any failure on the part of The Trading Company or its
goods and/or services to comply with any Governmental Requirements.

7.   BUYER: The Trading Company shall not, without first receiving written
permission from National, in any manner advertise, publish or otherwise
disseminate the fact that The Trading Company has contracted to furnish to
National the goods and/or services specified herein or any other information
relating to this Agreement.

8.   AUDIT: When, in the opinion of National, any aspect of the Agreement
requires financial or other auditing or appraisal, representatives designated by
National shall have the right to examine and copy any and all writings relating
to the Agreement in the possession or control of The Trading Company, and The
Trading Company agrees to make them available to National at reasonable times
for said purposes. National's right to audit shall extend for a period of one
year after the end of the Term. The Trading Company shall include in all
subcontracts a like provision under which National shall have the above rights
to audit each such subcontracts.

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