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 -