FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP OF SECURITIES Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person * ACKER MARIAN   2. Issuer Name and Ticker or Trading Symbol BARNES GROUP INC [B] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner __X__ Officer (give title below) _____ Other (specify below) VP, Controller (Last) (First) (Middle) BARNES GROUP INC., 123 MAIN STREET 3. Date of Earliest Transaction (Month/Day/Year) 08/02/2017 (Street) BRISTOL, CT 06010 4. If Amendment, Date Original Filed(Month/Day/Year) 6. Individual or Joint/Group Filing(Check Applicable Line) _X_ Form filed by One Reporting Person ___ Form filed by More than One Reporting Person (City) (State) (Zip) Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned

1.Title of Security (Instr. 3) 2. Transaction Date (Month/Day/Year) 2A. Deemed Execution Date, if any (Month/Day/Year) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock 08/02/2017   M   2,800 A $ 26.59 41,569.06 (1) D   Common Stock 08/02/2017   S(2)   2,800 D $ 60.375 38,769.06 (1) D   Common Stock 08/02/2017   M   3,200 A $ 24.24 41,969.06 (1) D   Common Stock 08/02/2017   S(2)   3,200 D $ 60.375 38,769.06 (1) D   Common Stock               3.65 I By Company's 401(k) Plan

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Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned
(e.g., puts, calls, warrants, options, convertible securities)

1. Title of Derivative Security (Instr. 3)

2. Conversion or Exercise Price of Derivative Security

3. Transaction Date (Month/Day/Year)

3A. Deemed Execution Date, if any (Month/Day/Year)

4. Transaction Code (Instr. 8)

5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5)

6. Date Exercisable and Expiration Date (Month/Day/Year)

7. Title and Amount of Underlying Securities (Instr. 3 and 4)

8. Price of Derivative Security (Instr. 5)

9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)

10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4)

11. Nature of Indirect Beneficial Ownership (Instr. 4)

Code

V

(A)

(D)

Date Exercisable

Expiration Date

Title

Amount or Number of Shares

Employee Stock Option (right to buy)

$ 26.59

08/02/2017

M

2,800

(3)

02/08/2022

Common Stock

2,800

(4)

0

D

Employee Stock Option (right to buy)

$ 24.24

08/02/2017

M

3,200

(5)

02/12/2023

Common Stock

3,200

(4)

0

D

Reporting Owners

Reporting Owner Name / Address	Relationships
	Director	10% Owner	Officer	Other
ACKER MARIAN BARNES GROUP INC. 123 MAIN STREET BRISTOL, CT 06010			VP, Controller

Signatures

William K. Piotrowski, pursuant to a Power of Attorney		08/04/2017
**Signature of Reporting Person		Date

Explanation of Responses:

*	If the form is filed by more than one reporting person, see Instruction 4(b)(v).
**	Intentional misstatements or omissions of facts constitute Federal Criminal Violations. See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
(1)	Includes balances of 333 Restricted Stock Units granted 2/12/2014, 266 granted 2/12/2014, 666 granted 2/11/2015, 1100 granted 2/10/2016,and 800 granted 2/8/2017, that are subject to forfeiture if certain events occur.
(2)	The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $60.35 to $60.40, inclusive. The reporting person undertakes to provide to Barnes Group Inc., any security holder of Barnes Group Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote to this Form 4.
(3)	The options vest 33.334% on the 18th month and 33.333% on the 30th and 42nd months from the 2/8/2012 grant date.
(4)	1 for 1.
(5)	The options vest 33.334% on the 18th month and 33.333% on the 30th and 42nd months from the 2/12/2013 grant date.

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