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                                                                    Exhibit 25.1

                                    FORM T-1
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                       SECURITIES AND EXCHANGE COMMISSION
                             WASHINGTON, D.C. 20549

                                  ------------

                            STATEMENT OF ELIGIBILITY
                    UNDER THE TRUST INDENTURE ACT OF 1939 OF
                   A CORPORATION DESIGNATED TO ACT AS TRUSTEE

                                  ------------

                      CHECK IF AN APPLICATION TO DETERMINE
                      ELIGIBILITY OF A TRUSTEE PURSUANT TO
                               SECTION 305(B)(2)_____

                                  ------------

                    UNITED STATES TRUST COMPANY OF NEW YORK
              (Exact name of trustee as specified in its charter)

           New York                                     13-3818954
(Jurisdiction of incorporation                       (I.R.S. employer
 if not a U.S. national bank)                       identification No.)

     114 West 47th Street                               10036-1532
         New York, NY                                   (Zip Code)
    (Address of principal
      executive offices)

                                  ------------

                             NEENAH FOUNDRY COMPANY
             (Exact name of GUARANTOR as specified in its charter)

             Wisconsin                                 39-1580331
   (State or other jurisdiction of                   (I.R.S. employer 
    incorporation or organization)                  identification No.)

      2121 Brooks Avenue, Box 729
         Neenah, Wisconsin                                54927
(Address of principal executive offices)               (Zip Code)

                                  ------------

   2
                                      -2-


                          HARTLEY CONTROLS CORPORATION
             (Exact name of GUARANTOR as specified in its charter)

                Wisconsin                                        39-0842568
    (State or other jurisdiction of                          (I.R.S. employer
     incorporation or organization)                         identification No.)

       2121 Brooks Avenue, Box 729
             Neenah, Wisconsin                                     54927
(Address of principal executive offices)                        (Zip Code)

                                  ------------

                             NEENAH TRANSPORT, INC.
             (Exact name of GUARANTOR as specified in its charter)

                Wisconsin                                        39-1378433
    (State or other jurisdiction of                          (I.R.S. employer
     incorporation or organization)                         identification No.)

       2121 Brooks Avenue, Box 729
             Neenah, Wisconsin                                     54927
(Address of principal executive offices)                        (Zip Code)

                                  ------------

   Neenah Corporation's 11-1/8% Senior Subordinated Notes due 2007, Series D
                      (Title of the indenture securities)

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                                      -3-

                                    GENERAL

1.      GENERAL INFORMATION

        Furnish the following information as to the trustee:

        (a)     Name and address of each examining or supervising authority to
                which it is subject.

                  Federal Reserve Bank of New York (2nd District), New York,
                    New York (Board of Governors of the Federal Reserve System)
                  Federal Deposit Insurance Corporation, Washington, D.C.
                  New York State Banking Department, Albany, New York

        (b)     Whether it is authorized to exercise corporate trust powers.

                The trustee is authorized to exercise corporate trust powers.

2.      AFFILIATIONS WITH THE OBLIGOR

        If the obligor is an affiliate of the trustee, describe each such
        affiliation. 

                None

3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14 and 15:

        Neenah Foundry Company, Hartley Controls Corporation and Neenah
        Transport, Inc. currently is not in default under any of its
        outstanding securities for which United States Trust Company of New
        York is Trustee. Accordingly, responses to Items 3, 4, 5, 6, 7, 8, 9,
        10, 11, 12, 13, 14 and 15 of Form T-1 are not required under General
        Instruction B.

16.     LIST OF EXHIBITS

        T-1.1  --  Organization Certificate, as amended, issued by the State of
                   New York Banking Department to transact business as a Trust
                   Company, is incorporated by reference to Exhibit T-1.1 to
                   Form T-1 filed on September 15, 1995 with the Commission
                   pursuant to the Trust Indenture Act of 1939, as amended by
                   the Trust Indenture Reform Act of 1990 (Registration No.
                   33-97056).

        T-1.2  --  Included in Exhibit T-1.1.

        T-1.3  --  Included in Exhibit T-1.1.

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                                      -4-

16. LIST OF EXHIBITS
    (cont'd)

        T-1.4  --  The By-Laws of United States Trust Company of New York, as
                   amended, is incorporated by reference to Exhibit T-1.4 to
                   Form T-1 filed on September 15, 1995 with the Commission
                   pursuant to the Trust Indenture Act of 1939, as amended by
                   the Trust Indenture Reform Act of 1990 (Registration No.
                   33-97056). 

        T-1.6  --  The consent of the trustee required by Section 321(b) of the
                   Trust Indenture Act of 1939, as amended by the Trust
                   Indenture Reform Act of 1990.
 
        T-1.7  --  A copy of the latest report of condition of the trustee
                   pursuant to law or the requirements of its supervising or
                   examining authority.


NOTE

As of July 29, 1997, the trustee had 2,999,020 shares of Common Stock
outstanding, all of which are owned by its parent company, U.S. Trust
Corporation. The term "trustee" in Item 2, refers to each of United States
Trust Company of New York and its parent company, U.S. Trust Corporation.

In answering Item 2 in this statement of eligibility as to matters peculiarly
within the knowledge of the obligor or its directors, the trustee has relied
upon information furnished to it by the obligor and will rely on information to
be furnished by the obligor and the trustee disclaims responsibility for the
accuracy or completeness of such information.

                                  ------------

Pursuant to the requirements of the Trust Indenture Act of 1939, the trustee,
United States Trust Company of New York, a corporation organized and existing
under the laws of the State of New York, has duly caused this statement of
eligibility to be signed on its behalf by the undersigned, thereunto duly
authorized, all in the City of New York, and State of New York, on the 29th day
of July, 1997.

UNITED STATES TRUST COMPANY
    OF NEW YORK, Trustee

By: /s/ Patricia Sterman
    ------------------------
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                                                                   EXHIBIT T-1.6


       The consent of the trustee required by Section 321(b) of the Act.

                    United States Trust Company of New York
                              114 West 47th Street
                               New York, NY 10036

September 1, 1995

Securities and Exchange Commission
450 5th Street, N.W.
Washington, DC 20549

Gentlemen:

Pursuant to the provisions of Section 321(b) of the Trust Indenture Act of
1939, as amended by the Trust Indenture Reform Act of 1990, and subject to the
limitations set forth therein, United States Trust Company of New York ("U.S.
Trust") hereby consents that reports of examinations of U.S. Trust by Federal,
State, Territorial or District authorities may be furnished by such authorities
to the Securities and Exchange Commission upon request therefor.

Very truly yours,

UNITED STATES TRUST COMPANY
       OF NEW YORK


    -----------------------
By: /s/ Gerard F. Ganey
    Senior Vice President
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                                                                   EXHIBIT T-1.7


                    UNITED STATES TRUST COMPANY OF NEW YORK
                      CONSOLIDATED STATEMENT OF CONDITION
                                 MARCH 31, 1997
                                 (IN THOUSANDS)



ASSETS
                                                                 
Cash and Due from Banks                                             $    59,856

Short-Term Investments                                                  213,333

Securities, Available for Sale                                          968,413

Loans                                                                 1,370,272
Less: Allowance for Credit Losses                                        13,614
                                                                     ----------
   Net Loans                                                          1,356,658
Premises and Equipment                                                   61,183
Other Assets                                                            125,938
                                                                     ----------
   TOTAL ASSETS                                                      $2,785,381
                                                                     ==========

LIABILITIES
Deposits:                   
   Non-Interest Bearing                                              $  480,539
   Interest Bearing                                                   1,738,130
                                                                     ----------
     Total Deposits                                                   2,218,669

Short-Term Credit Facilities                                            271,567
Accounts Payable and Accrued Liabilities                                131,642
                                                                     ----------
   TOTAL LIABILITIES                                                 $2,621,878
                                                                     ==========
STOCKHOLDER'S EQUITY
Common Stock                                                             14,995
Capital Surplus                                                          42,541
Retained Earnings                                                       101,577
Unrealized Gains (Losses) on Securities
   Available for Sale, Net of Taxes                                      (2,610)
                                                                     ----------
TOTAL STOCKHOLDER'S EQUITY                                              163,503
                                                                     ----------
   TOTAL LIABILITIES AND
   STOCKHOLDER'S EQUITY                                              $2,785,381
                                                                     ==========


I, Richard E. Brinkmann, Senior Vice President & Comptroller of the named bank
do hereby declare that this Statement of Condition has been prepared in
conformance with the instructions issued by the appropriate regulatory
authority and is true to the best of my knowledge and belief.

Richard E. Brinkmann, SVP & Controller

June 22, 1997