AMCAST INDUSTRIAL CORPORATION

                     NONQUALIFIED SUPPLEMENTARY BENEFIT PLAN

       Effective as of June 1, 1999, as restated through January 12, 2000


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.

               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.

              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 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
                             Participant's  Credited  Service (as defined in the
                             Qualified 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 commencement
                             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 Participant'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 Parti-
                              cipant or  Participant's  Beneficiary,  the  Comp-
                              any  shall pay to the Participant or Participant's
                              Beneficiary  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
                              Participant or the Participant's Beneficiary under
                              this Plan. In calculating such Net  Present  Value
                              Amount, the Determination 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
                              begin  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 Participant 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 Section 3.3(a) hereof,in the event
                              the Trust has been funded as a result of a  Change
                              of Control  and the  Participant's employment with
                              the Company is terminated by  the  Company for any
                              reason other than cause (as defined in the  Change
                              of Control Agreements), the Participant shall have
                              the option  to  elect to  receive the Net  Present
                              Value Amount,  provided  such  election is made no
                              later than one week after the Participant's  term-
                              ination by the Company.  Payment shall be made  on
                              the date on which the first payment is  due  under
                              the Qualified Plan.   After the payment  described
                              in this Section is made, the Company shall have no
                              further obligation  to  the Participant under this
                              Plan.  In calculating the Net Present Value Amount
                              in regard to this Section 3.3(e),the Determination
                              Date  shall be  the date on which the  Participant
                              exercised his or her option under this Section.

              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 defined 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 calc-
                              ulating such Net Present Value Amount, the Determ-
                              ination Date shall be the date on which the Change
                              of Control occurred. 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 ac-
                              cordance with this Plan.

                      b.      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  payment
                              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
                              Value  Amount  of all  remaining  payments  to all
                              Participants.

                      c.      In the event all required payments are made to all
                              Participants  or their  Beneficiaries,  all  funds
                              remaining  in  the  Trust  shall  be   immediately
                              delivered to the Company.

              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.

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  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
qualified 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.


<PAGE>


              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
------------------------
Denis G. Daly, Secretary

<PAGE>


                                     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 of  Participant,  Participant's  spouse,  or their
combined 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 the 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.