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
                                                                                  
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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(f) of the Investment Company Act of 1940
                      

1. Name and Address of Reporting Person *

BARNES THOMAS O 		2. Issuer Name and Ticker or Trading Symbol

BARNES GROUP INC [ B ] 		5. Relationship of Reporting Person(s) to Issuer (Check all applicable)

__ X __ Director                      _____ 10% Owner
_____ Officer (give title below)      _____ Other (specify below)
(Last)          (First)          (Middle)

BARNES GROUP INC., 123 MAIN STREET 		3. Date of Earliest Transaction (MM/DD/YYYY)

5/14/2010
(Street)

BRISTOL, CT 06011-0489
(City)        (State)        (Zip)
4. If Amendment, Date Original Filed (MM/DD/YYYY)

 
6. Individual or Joint/Group Filing (Check Applicable Line)

_ X _ Form filed by One Reporting Person
___ Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1.Title of Security
(Instr. 3) 		2. Trans. Date 2A. Deemed Execution Date, if any 3. Trans. 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   3/10/2010     G (2)   V 6000   D $0   300196   (1) I   Trust #CF-2078  
Common Stock   3/10/2010     G (2)   V 750   A $0   0   D  
 
Common Stock   5/14/2010     M    10000   A $9.105   0   D  
 
Common Stock   5/14/2010     S    10000   D $20.6303   207691.0424   (3) D  
 
Common Stock                  28604.387   I   By 401(k) Plan  
Common Stock                  3889.0418   (1) I   By my wife  
Common Stock                  39356   (1) I   Trust #42-01-100-8546568  
Common Stock                  418768   (1) I   Trust #42-01-100-8546559  
Common Stock                  76470   (1) I   Trust #42-01-100-8550714  
Common Stock                  161652   (1) I   Trust #42-01-100-8550720  
Common Stock                  487540   (1) I   Trust #42-01-100-8550719  
Common Stock                  414756   (1) I   Trust #42-01-100-8546558  
Common Stock                  84432   (1) I   Trust #42-01-100-8550713  
Common Stock                  177409   (1) I   Trust #CF2363  
Common Stock                  888352   (1) I   Trust #CF5046  
Common Stock                  428136   (1) I   Trust #CF5048  

Table II - Derivative Securities Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities)
1. Title of Derivate Security
(Instr. 3) 		2. Conversion or Exercise Price of Derivative Security 3. Trans. Date 3A. Deemed Execution Date, if any 4. Trans. 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 7. Title and Amount of Securities Underlying Derivative Security
(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 Stk Option-Right to Buy   $9.105   5/14/2010     M         10000      (4) 2/6/2011   Common Stock   10000     (5) 0   D  
 

Explanation of Responses:
( 1)  Reporting Person hereby disclaims beneficial ownership of shares held by his Wife, and the Trusts except to the extent of his pecuniary interest.
( 2)  Gift from H.F. Barnes Trust No. CF2078 of 750 shares each to 8 recipients, including Reporting Person, for total of 6,000 shares.
( 3)  Includes a balance of 2947 Restricted Stock Units granted 2/10/09 and 4913 granted 2/8/10 that are subject to forfeiture if certain events occur.
( 4)  The options fully vested on 2/6/2004.
( 5)  1 for 1.

Reporting Owners
Reporting Owner Name / Address
Relationships
Director 10% Owner Officer Other
BARNES THOMAS O
BARNES GROUP INC.
123 MAIN STREET
BRISTOL, CT 06011-0489 		X



Signatures
Monique B. Marchetti, pursuant to Power of Attorney 5/17/2010
** Signature of Reporting Person Date


Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* 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).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB control number.
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