AMCAST INDUSTRIAL CORPORATION

                     NONQUALIFIED SUPPLEMENTARY BENEFIT PLAN

                                                      (JUNE 1, 2000 RESTATEMENT)


Article I.  Purpose and Definitions

         1.1  Purpose  - In order to  permit a select  group of  management  and
highly  compensated  employees  of the Company to earn equal and full credit for
all years of service to the Company,  to cause these  employee's  pensions to be
calculated  based upon  compensation  above,  certain  limits  applicable to the
Qualified Plan and to provide certain other  supplemental  retirement  benefits,
the Company has adopted the following supplemental retirement plan (the "Plan").

         1.2 Actuarial  Equivalent - A benefit equal in value to the benefit for
which it is substituted as determined  actuarially on the basis of such rates of
interest and rates of mortality  herein set forth.  Actuarial  Equivalent  under
this Plan will be  calculated  assuming an  investment  return based on the PBGC
interest  rate in effect  on the  first day of the year in which the  retirement
occurs and the UP-1984 Mortality Table.

         1.3  Code - The Internal Revenue Code of 1986, as amended.

         1.4 Company - Amcast Industrial Corporation,  an Ohio corporation,  and
its divisions and subsidiaries.

         1.5  Executive  Participant  - An employee of the Company who is, as of
June 1,  1999,  the  Chairman  of the Board of  Directors  of the  Company  or a
corporate  officer of the Company who reports directly to the Chairman or is the
President  of  Elkhart  Products  Corporation  or,  as of June 1,  2000,  is the
President of Amcast Automotive Inc.

         1.6  Income  - The  total  compensation  paid  during  employment  to a
Participant by the Company while he or she is a Participant,  including  regular
pay,  overtime pay,  annual  incentive  payments,  bonuses,  commissions,  and a
Participant's  salary  deferral  contributions  to the  Company's  401(k) Salary
Deferral Plan and Employees Flexible  Compensation Plan, but excluding any other
Employer  contributions made to any "employee benefit plan" for the Participant,
such as reimbursed  expenses,  special  awards,  gifts or allowances,  severance
payments,   payments   under  the  Company's   Long-Term   Incentive   Plan  and
extraordinary compensation.

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         1.7  Participant  - All employees of the Company (a) who are members of
the  Qualified  Plan,  and (b) whose  income  exceeds  the amount  specified  in
401(a)(17) of the Federal Code.

         1.8  Participant's  Beneficiary  - The  person or persons  entitled  to
receive  benefits  under the Qualified  Plan because of a  relationship  with or
designation  by a  Participant.  The  Participant's  Beneficiary  is entitled to
receive a portion  of the  Participant's  benefits  under the Plan  equal to the
portion of Participant's benefits that the Participant's Beneficiary is entitled
to receive under the Qualified Plan.

         1.9 Qualified  Plan - The Amcast Merged  Pension Plan,  Part "A", f/k/a
the Amcast Pension Plan for Salaried Employees.

Article II.  Administration

         2.1      Administrator - The Plan shall be administered by  the pension
and benefits department of the Company.

Article III.      Benefits

         3.1  Qualified  Plan  Pension  -  At  the  time  of   retirement,   all
Participants  shall have their pensions  calculated  under the provisions of the
Qualified Plan,  taking into account the  Participant's age and years of service
at retirement,  the retirement  option selected by  Participant,  and such other
factors set forth in the Qualified Plan or any provision of federal,  state,  or
local law, as would affect the  calculation of  Participant's  benefit under the
Qualified  Plan.  This  is  the  amount  of  the  pension  payments  payable  to
Participant or Participant's Beneficiary under the Qualified Plan.

         3.2  Benefits Under the Plan

                a. At  the  time of a Participant's retirement,  the following
                   calculation shall be made:

                   i. Any Participant who is not an Executive  Participant shall
                      have a  calculation  made as to the amount their  benefits
                      would be under the  Qualified  Plan using the same formula
                      as  described  in Section 3.1 hereof,  but not taking into
                      account any  reduction in benefits or any reduction in the
                      amount of income or time of  service  used in  calculating
                      benefits resulting from any provision of federal, state or
                      local law.

                   ii. Any  Participant  who is an Executive  Participant  shall
                       have a calculation  made as to the amount their  benefits
                       would be under the  Qualified  Plan using the  formula as
                       described in Section 3.1 hereof,  not taking into account
                       any  reduction in benefits or any reduction in the amount

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                       of income or time of service used in calculating benefits
                       resulting  from any provision of federal,  state or local
                       law (including, but not limited to, Section 401 (a)(4) of
                       the  Code  and  regulations   thereunder),   and  further
                       modified as follows:

                           A. In  calculating  such  benefits,  2.5%  shall   be
                              substituted for the percentage used in  making the
                              calculation described in Section 1.1(a)(ii)(A)  of
                              the Qualified Plan.

                           B. In calculating  such  benefits, any such  Partici-
                              pant's Credited  Service  (as defined in the Qual-
                              ified Plan)shall be increased by 3 full years,with
                              the total of such Credited Service not  to  exceed
                              30 years; and

                           C. In calculating  any reduction for early  commence-
                              ment of such benefits,  any such Participant's age
                              shall be deemed to be 3 years more than his actual
                              age, with his deemed age not to exceed age 65.

                b. In any instance where the benefit payable to a Participant or
                   the  Participant's  Beneficiary  under the Qualified  Plan is
                   less than the  benefit  calculated  for such  Participant  in
                   accordance with the applicable provisions of paragraph 3.2(a)
                   above, the Participant or Participant's  Beneficiary shall be
                   entitled  to  receive a  pension  under the Plan in an amount
                   which when added to the amount the  Participant  or  Partici-
                   pant's Beneficiary is entitled to receive under the Qualified
                   Plan,  results in a total amount of pension  payments payable
                   to the Participant or Participant's Beneficiary from the Plan
                   plus the Qualified Plan equal to the amount  calculated  with
                   respect to the  Participant or  Participant's  Beneficiary in
                   accordance with the applicable provisions of paragraph 3.2(a)
                   above.

         3.3 Payment of Plan Benefits-Benefits  shall be payable to Participants
under the terms of any of the following options.

                a. Benefits under the Plan shall  be payable at the  same  times
                   and intervals as benefits payable under the Qualified Plan.

                b. Notwithstanding  Section 3.3(a) hereof, at any time after the
                   end of  Participant's  employment with the Company and at the
                   election of the Participant or Participant's Beneficiary, the
                   Company shall pay to the Participant or  Participant's  Bene-
                   ficiary an amount equal to the Net Present Value  Amount,  as
                   defined in Section 3.5 hereof,less 10 percent of such amount.
                   After the payment  described in this Section  3.3(b) is made,
                   the Company shall have no further  obligation to the Partici-
                   pant or the  Participant's  Beneficiary  under this Plan.  In
                   calculating such Net Present Value Amount,  the Determination

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                   Date shall be the date on which the Participant exercised his
                   or her option  under this  Section.  Such net  Present  Value
                   Amount shall be paid to the Participant as soon as practical,
                   but not more than 30 days after the Determination Date.

                c. Notwithstanding  Section 3.3(a) hereof, the Participant shall
                   be entitled,  no later than three months prior to termination
                   of  Participant's  employment  with the Company,  to elect to
                   receive the Net Present Value Amount at the time payments be-
                   gin under the Qualified Plan. The Participant  shall have the
                   option to change  such  election  from time to time  provided
                   that such change is made no later than three  months prior to
                   the  termination  of the  Participant's  employment  with the
                   Company. After the payment described in this Section is made,
                   the Company shall have no further  obligation to the Partici-
                   pant under this Plan.  In  calculating  the Net Present Value
                   Amount in regard to this Section  3.3(d),  the  Determination
                   Date  shall  be the  first  day of the  month  preceding  the
                   Participant's termination of employment.

                d. Notwithstanding  anything in this  Agreement to the contrary,
                   in the event that (i) an Executive  Participant or his spouse
                   elects the purchase of an annuity pursuant to Section 3.5 and
                   (ii) the Company is required to  (pursuant to Section 3.3) or
                   agrees to pay the Net Present  Value Amount to the  Executive
                   or his spouse,  the Company has  discretion to have the Trust
                   distribute  any annuity policy or the right to future annuity
                   payments held by such Trust in complete  satisfaction of such
                   obligation.  If an  annuity  policy or the  right to  annuity
                   payment is distributed  to the Executive  pursuant to Section
                   3.3(b),  the  Executive  shall pay to the  Company  an amount
                   equal to the 10 percent reduction described therein.

         3.4 Trust - The Company  agrees it will  establish a "Guarantor"  trust
(the "Trust"), and a copy of which will be attached hereto as Annex A.

                a. In the event of a Change of  Control of the  Company  (as de-
                   fined in the form of contract approved for certain executives
                   of the  Company by the Board of  Directors  of the Company on
                   12/19/89  ("Change  of  Control  Agreements"))   ("Change  of
                   Control"),  the Company shall fund the Trust,  as hereinafter
                   defined,  in an amount equal to the Net Present  Value Amount
                   (as defined at Section 3.5). In calculating  such Net Present
                   Value  Amount,  the  Determination  Date shall be the date on
                   which the Change of Control occurred.

                b. At the election of an Executive Participant (or his spouse if
                   the  Executive   Participant   is  deceased)   following  the
                   commencement of retirement  payments to an Executive Partici-
                   pant or his spouse under the Qualified Plan and the SERP (but
                   not if employment termination is for Cause, as defined in the
                   Change in Control  Agreements),  the  Company  shall fund the
                   Trust in an amount equal to the Net Present Value Amount.  In

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                   calculating  such net Present  Value Amount,  the  Determina-
                   tion Date shall be the date on which Executive Participant or
                   his spouse exercises the option under this Section.

                c. Funding of the Trust,either under this Section or voluntarily
                   by the  Company,  will not  relieve the Company of any of its
                   payment  obligations  under this Plan,  and such  obligations
                   will be fulfilled only upon actual payment in accordance with
                   this Plan.

                d. If the  Trust is funded  at the time a  payment  is  required
                   under this  Agreement,  the payment will be made on behalf of
                   the  Company by the  Trustee out of Trust funds to the extent
                   permitted by the Trust; provided that the making of such pay-
                   ment shall not reduce the  balance in the Trust below the Net
                   Present  Value Amount (as defined in Section 3.5) of the then
                   remaining  payments to all  Participants.  The  Determination
                   Date for each such  calculation  of Net Present  Value Amount
                   will be the related payment date.

                   At any time when it is determined  that the remaining  assets
                   of the Trust are  reduced to an amount  below the Net Present
                   Value Amount of all remaining  payments to all  Participants,
                   the Company shall,  within six months of such  determination,
                   deposit  an  amount  in the  Trust so that the  assets of the
                   trust  are at least  equal to the Net  Present  Amount of all
                   remaining  payments to all Participants.  The readjustment of
                   the Trust  assets  shall not take into  account the  benefits
                   payable to an  Executive  Participant  or his spouse with re-
                   spect to which an election has been made  pursuant to Section
                   3.5 to fund the Trust with an annuity.

                e. In the event all  required  payments are made to all Partici-
                   pants or their Beneficiaries,all funds remaining in the Trust
                   shall be immediately delivered to the Company.

                f. The Company shall instruct that the periodic  payments on any
                   annuity policy purchased  pursuant to Section 3.5 commence no
                   later  than  twelve  months  from  the  date  of the  annuity
                   purchase.

         3.5 Net  Present  Value  Amount - For the  purpose of  determining  the
amount  needed to fund the Trust as  described  in Section  3.4 or the amount of
payments to be made as  described  in Section  3.3,  the  Company's  independent
actuaries will  calculate the net present value of all payments  remaining to be
made to Participant  or  Participant's  Beneficiary  under this Plan (herein the
"Net Present Value Amount"). The Net Present Value Amount shall be determined as
of the Determination Date (herein the  "Determination  Date") in accordance with
the provisions of Annex B attached.

Notwithstanding  anything in this Agreement to the contrary,  at the election of
an  Executive  Participant  (or  his  spouse  if the  Executive  Participant  is
deceased)  following the  commencement  of  retirement  payments to an Executive
Participant  or his  spouse  under the  Qualified  Plan and the SERP (but not if

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employment  termination  is for  Cause,  as  defined  in the  Change in  Control
Agreements), the Company shall fund the Trust with either (a) an amount equal to
the single  premium  necessary to purchase an annuity or (b) an annuity  policy,
that provides payments  approximately  equal to the annual benefit described and
calculated  in  accordance  with this Plan.  The Company has  discretion  to (i)
reject such election if a single premium for such annuity policy exceeds the Net
Present  Value  Amount and (ii)  purchase an annuity  policy  from an  insurance
carrier  rated A or better  with AM Best to  provide  the Trust  with the annual
benefit  described  herein.  In the same manner,  the Trust shall state that the
Executive  Participant (or his spouse if the Executive  Participant is deceased)
following the dates stated in this  subparagraph can instruct the trustee to use
Trust assets to purchase an annuity.

Article IV.  General

         4.1 Amendment  and  Termination - The Plan may be altered or terminated
only by action of  three-fourths  (3/4) of the entire  Board of Directors of the
Company at a valid meeting.  Such termination shall in no way effect,  alter, or
reduce  any  vested  right  of  any  Participant  existing  at the  time  of the
termination.

         4.2  Vesting -  Participant's  rights  under the Plan shall vest at the
time when the Participant's Income and time of service are such that Participant
would be entitled  to receive a pension  under the Plan if  Participant  were of
retirement  age under  the terms of the  Qualified  Plan and  retired  under the
Qualified  Plan  or,  in the  case  of an  Executive  Participant,  when  he has
completed five years of Credited Service as calculated under the Plan.

         4.3  Effect  on  Qualified   Plans  -  The  adoption,   administration,
amendment,  or  termination  of the Plan shall have no effect upon the Qualified
Plan or any other of the Company's qualified plans.

         4.4  Non-Assignability  of Right to  Receive  Benefits  - The  right to
receive  benefits  under  the  Plan  may not be  anticipated,  alienated,  sold,
transferred,  assigned, pledged, encumbered, or subjected to any charge or legal
process;  and if any  attempt  is made to do so,  or a person  eligible  for any
benefit becomes bankrupt, the interest under the Plan of the person affected may
be terminated by the Company, and the Committee may cause the same to be held or
applied for the  benefit of such person or one or more of his or her  dependents
in such manner as it deems proper.

         4.5 This Plan not an  Employment  Contract - This Plan does not give to
any Participant the right to be continued in employment or otherwise  enlarge or
affect employment status or rights.

         4.6  Applicable  Law - All questions  pertaining  to the  construction,
validity, and effect of the provisions hereof are to be determined in accordance
with the laws of the State of Ohio.

         4.7 Non-Funded Plan - Except as provided herein, the entire cost of the
Plan will be paid from the general  assets of the  Company.  It is the intent of
the  Company  to pay  benefits  under  the Plan as they  become  due  under  the
provisions of Section 3.3 hereof. No liability for the payment of benefits under

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the Plan shall be imposed upon any officer,  director,  employee, or stockholder
of the Company.

         4.8 Plan not a Qualified  Plan - The Plan is not intended to be a qual-
ified pension plan.

         4.9  Effect  on  Contractual  Rights - The Plan  shall  not  reduce  or
otherwise  adversely affect any contractual  right with respect to retirement of
any person who is a Participant or a Participant's  Beneficiary,  or relieve the
Company of any  contractual  obligation with respect to retirement of any person
who is a  participant  or  participant's  Beneficiary,  except to the  extent of
payments made under this Plan.

         4.10 Severability - If any provisions of the Plan shall be held illegal
or invalid for any reason,  said  illegality or invalidity  shall not affect the
remaining parts of the Plan, but this Plan shall be construed and enforced as if
said illegal or invalid provision had never been included herein.

         4.11     Effective Date - The Plan is effective as of June 1, 1999.


                                       /s/ John H. Shuey

                                       --------------------------------
                                       John H. Shuey, Chairman, President
                                       and Chief Executive Officer

ATTEST:

/s/ Denis G. Daly                      /s/ R. William Van Sant
--------------------------------       ---------------------------------
Denis G. Daly, Secretary                R. William Van Sant
                                        Chairman, Compensation Committee


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                                     ANNEX B

In  calculating  the Net Present Value Amount,  the following  provisions  shall
apply; (i) all remaining payments under the SERP shall be provided for; (ii) the
actuarial principles used in connection with the Qualified Plan shall be used to
establish the life expectancy,  as the case may be, as of the Determination Date
for purposes of establishing  the period over which the payments under Article 3
shall be assumed  to be made;  and (iii) an annual  discount  rate equal to PBGC
Discount  Rate shall be used to discount  future  payments to the  Determination
Date, or if  applicable  to calculate a lump sum amount  pursuant to Section 3.3
for any Participant  with an agreement that limits certain benefits to avoid the
20% tax  pursuant  to Section  4999 of the  Internal  Revenue  code of 1986,  as
amended,  such other  discount  rate as is necessary to avoid any payments  from
being  subject  to such  additional  20% tax.  As used in this Annex B, the PBGC
Discount Rate shall mean the average of the PBGC discount rates used pursuant to
Section 417(e) (3) (B) of the Internal Revenue Code of 1986, as amended, for the
three months immediately preceding the Determination Date.