Exhibit 5.1 ----------- [LETTERHEAD] Mary Louise Beardsley Executive Office Associate General Counsel 123 Main Street and Secretary P.O. Box 489 Bristol, CT 06011-0489 U.S.A. BARNES [LOGO] Tel. (203) 583-0707 GROUP INC. Fax (203) 589-3507 July 18, 1994 Barnes Group Inc. 123 Main Street Bristol, Connecticut 06010 Gentlemen and Mesdames: I am the Associate General Counsel and Secretary of Barnes Group Inc. (the "Company") and I have acted as legal counsel to the Company in connection with the filing with the Securities and Exchange Commission of a Registration Statement on Form S-8 under the Securities Act of 1933, as amended, relating to 900,000 shares of the Company's common stock, par value $1.00 per share, issuable under the 1991 Barnes Group Stock Incentive Plan adopted April 3, 1991, as amended April 6, 1994 (the "Plan"). In my capacity as Associate General Counsel and Secretary for the Company, I have examined and am familiar with (i) the Certificate of Incorporation and the By-Laws of the Company, as amended; (ii) the corporate proceedings of the Company relating to the issuance of the shares; and (iii) such agreements, certificates of public officials, certificates of officers or representatives of the Company and others, and such other documents, certificates and records as I have deemed necessary or appropriate as a basis for the opinions set forth herein. In such examination, I have assumed the genuineness of all signatures, the legal capacity of natural persons, the authenticity of all documents submitted to me as originals, the conformity to original documents of all documents submitted to me as certified, conformed or photostatic copies, and the authenticity of the originals of such latter documents. As to any facts material to the opinions expressed herein which I did not independently establish or verify, I have relied upon statements and representations of officers and other representatives of the Company and others. During the course of my - 9 - Barnes Group Inc. Page 2 July 18, 1994 discussions with officers and representatives of the Company and my review of the documents specified above in connection with the preparation of this opinion, no facts were disclosed to me which cause me to conclude that any such statement or representation is untrue. Based upon and subject to the foregoing, I am of the opinion that all necessary corporate proceedings have been duly taken to authorize the issuance of the Company's common stock under the Plan, and that if said shares are issued in accordance with the Plan upon the exercise of stock options or stock appreciation rights or on payment under performance unit awards or pursuant to incentive stock rights said shares will be legally issued, fully paid and non-assessable. I consent to the filing of this opinion as an exhibit to said Registration Statement and the Prospectus which is part of the aforesaid Registration Statement, including any amendments thereto, but do not thereby admit that I come within the category of persons whose consent is required under Section 7 of the Securities Act of 1933, as amended, or the Rules and Regulations of the Securities and Exchange Commission thereunder. Very truly yours, Mary Louise Beardsley Mary Louise Beardsley MLB/ekt - 10 -