Exhibit 4(h) October 26, 1996 The Boatmen's National Bank of St. Louis P.O. Box 236 St. Louis, MO 63166 Attention: Timothy L. Drone, Vice President & Manager Bank of Boston Connecticut Corporate Banking 1 Landmark Square Stamford, CT 06901 Attention: Jo Ann Keller, Director The Chase Manhattan Bank, N.A. One Chase Plaza New York, NY 10081 Attention: Scott S. Ward, Vice President Citibank, N.A. 399 Park Avenue, 8th Floor New York, NY 10043 Attention: Goran Sare, Vice President 2 Credit Suisse New York Branch 12 East 49th Street New York, NY 10017 Attention: Lynn Allegaert Morgan Guaranty Trust Company of New York 60 Wall Street New York, NY 10260-0060 Attention: Martin R. Atkin, Managing Director Re: Second Amendment and Waiver --------------------------- Dear Sirs: We refer to the Credit Agreement, dated as of September 30, 1993, as amended effective May 1, 1995 ("Credit Agreement"), among Olin Corporation ("Borrower"), Bank of Boston Connecticut, Citibank, N.A., Credit Suisse, Morgan Guaranty Trust Company of New York, The Boatmen's National Bank of St. Louis and The Chase Manhattan Bank, N.A. Capitalized terms utilized but not defined herein have the meanings specified in the Credit Agreement. The following sets forth the agreement of the undersigned to waive provisions of the Credit Agreement with respect to the spinoff to the Borrower's shareholders of the Borrower's Ordnance and Aerospace Divisions as specified below and to amend Section 4.01(e) of the Credit Agreement: 1. The Borrower has informed the Banks that it proposes to spinoff to its shareholders the business and assets of its Ordnance and Aerospace Divisions, including the subsidiaries relating thereto. The spinoff would be effectuated by the declaration of a dividend in the form of the shares of a recently-formed corporation ("Newco"), a Virginia corporation and wholly-owned Subsidiary of the Borrower, to which the assets and certain liabilities of these Divisions will be transferred prior to the spinoff. The Borrower has requested that the Banks consent to the proposed spinoff notwithstanding the provisions of the Credit Agreement. Notwithstanding anything to the contrary contained in the Credit Agreement, the Lenders hereby consent to the proposed spinoff described herein, agree that the proposed spinoff shall not constitute an Event of Default under the Credit Agreement and waive compliance with any provisions thereof in connection therewith. 2. The text contained in Section 4.01(e) is hereby deleted and replaced with "(e) [Intentionally Left Blank]". 3 3. Except as amended or waived hereby, the provisions of the Credit Agreement remain in full force and effect. 4. This second amendment and waiver shall become effective as of October 31, 1996 provided it is approved by the Banks as required by Section 8.01 of the Credit Agreement at any time. The Borrower confirms that the representations and warranties contained in Section 4.01 of the Credit Agreement are correct as though made on and as of the date hereof (for this purpose the term "Agreement" as used in Section 4.01 shall mean the Credit Agreement as amended hereby). Kindly confirm by your signature below your agreement to the foregoing. BORROWER -------- OLIN CORPORATION By ----------------------------------------- Title: Vice President and Treasurer Commitment BANKS - ---------- ----- $ 20,000,000 BANK OF BOSTON CONNECTICUT By: ---------------------------------------- Name: Title: $ 50,000,000 CITIBANK, N.A. By: ---------------------------------------- Name: Title: 4 $ 20,000,000 CREDIT SUISSE By: ---------------------------------------- Name: Title: By: ---------------------------------------- Name: Title: $ 40,000,000 MORGAN GUARANTY TRUST COMPANY OF NEW YORK By: ---------------------------------------- Name: Title: $ 30,000,000 THE BOATMEN'S NATIONAL BANK OF ST. LOUIS By: ---------------------------------------- Name: Title: By: ---------------------------------------- Name: Title: $ 90,000,000 THE CHASE MANHATTAN BANK, N.A. By: ---------------------------------------- Name: Title: $250,000,000 Total of the Commitments