Document:

Letter Amendment dated February 12, 2007.

 Exhibit 4.3 (vi) 
 February 12, 2007 
 BARNES GROUP INC. 
 123 Main Street 
 Bristol, CT 06010 
 Attn: Lawrence W. O’Brien 
 Vice President and Treasurer 
 LETTER AMENDMENT 
  

	 	Re:	Note Purchase Agreements, each dated as of November 21, 2000 (collectively, as amended, the “Note Purchase Agreement”) by and between BARNES GROUP INC. (the
“Company”) and each of THE PRUDENTIAL INSURANCE COMPANY OF AMERICA, ALLSTATE LIFE INSURANCE COMPANY, NATIONWIDE LIFE INSURANCE COMPANY, NATIONWIDE LIFE AND ANNUITY INSURANCE COMPANY and NATIONWIDE INDEMNITY COMPANY (collectively,
the “Noteholders”) 

 Ladies and Gentlemen: 
 Reference is made to the Note Purchase Agreement; capitalized terms used in this letter amendment (this “Letter Amendment”) and not otherwise defined herein having the meaning provided in the Note
Purchase Agreement. 
 The Noteholders and Company hereby agree that, effective as of January 11, 2006, the Note Purchase Agreement
shall be amended as follows: 
 (i) Section 7.6(a)(vii) of the Note Purchase Agreement is hereby amended and restated in its entirety to
read as follows: 
 “(vii) other liens, that in the aggregate, when combined with all Indebtedness of Subsidiaries
permitted to exist by Section 7.7(b) would not, at any time, exceed 15% of Consolidated Assets determined as of the end of the then most recently completed fiscal year of the Company.” 
 (ii) Section 7.7(b) of the Note Purchase Agreement shall be amended and restated in its entirety to read as follows: 
 “(b) Notwithstanding the foregoing, the Company will not permit any of its Subsidiaries to, directly or indirectly incur, create,
assume or permit to exist any Indebtedness unless (1) all Indebtedness of Subsidiaries (other than 

 
Indebtedness of Foreign Subsidiaries all of whose lenders are party to the Sharing Agreement) plus (2) all Indebtedness of the Company secured by
Liens permitted to exist by Section 7.6(a)(vii), shall not at any time exceed 15% of Consolidated Assets determined as of the end of the most recently completed fiscal year of the Company.” 
 This Letter Amendment shall become effective upon the satisfaction in full of the following conditions precedent: (i) the Company and the holders of
66-2/3% of the aggregate outstanding principal amount of Notes shall have executed this Letter Amendment and (ii) the Noteholders’ counsel shall have received a copy of the Letter Amendment, dated the date hereof, to those separate Note
Agreements, each dated as of November 12, 1999 (as amended), executed by the requisite percentage of the holders of the notes issued thereunder to be effective. 
 Except as expressly provided in this Letter Amendment, the Note Purchase Agreement and the Notes shall remain in full force and effect, without modification or amendment. This Letter Amendment shall be binding upon,
and shall inure to the benefit of, the successors and assigns of each of the parties hereto and the holders from time to time of the Notes. 
 The Company shall promptly pay all reasonable expenses relating to this Letter Amendment, including but not limited to the reasonable fees and disbursements of Bingham McCutchen LLP, special counsel to the Noteholders. 
 Two or more duplicate originals of this Letter Amendment may be signed by the parties, each of which shall be an original but all of which together shall
constitute one instrument. Each counterpart may consist of a number of copies hereof, each signed by less than all, but together signed by at least 66-2/3% of the holders of aggregate outstanding principal amount of Notes. Delivery of an executed
signature page by facsimile or electronic transmission shall be as effective as a manually signed counterpart of this Letter Amendment. 
 THIS LETTER AMENDMENT SHALL BE GOVERNED BY, AND CONSTRUED AND ENFORCED IN ACCORDANCE WITH, THE INTERNAL LAWS OF THE STATE OF CONNECTICUT EXCLUDING CHOICE-OF-LAW PRINCIPLES OF THE LAW OF SUCH STATE THAT WOULD REQUIRE THE APPLICATION OF THE
LAWS OF A JURISDICTION OTHER THAN SUCH STATE. 
 [Remainder of page intentionally blank.] 
  

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	Very truly yours,
	
	THE PRUDENTIAL INSURANCE COMPANY OF AMERICA
		
	By:	 	 /s/ Yvonne Guajardo

	Name:	 	Yvonne Guajardo
	Title:	 	Vice President

 [Signature Page to Letter Amendment to 2000 Barnes Note Agreement] 

			
	ALLSTATE LIFE INSURANCE COMPANY
		
	By:	 	 /s/ David Walsh

	Name:	 	David Walsh
		
	By:	 	 /s/ Charles D. Mires

	Name:	 	Charles D. Mires
		 	Authorized Signatories

 [Signature Page to Letter Amendment to 2000 Barnes Note Agreement] 

			
	NATIONWIDE LIFE INSURANCE COMPANY
		
	By:	 	 /s/ Joseph P. Young

	Name:	 	Joseph P. Young
	Title:	 	Authorized Signatory

  

			
	NATIONWIDE LIFE AND ANNUITY
INSURANCE COMPANY
		
	By:	 	 /s/ Joseph P. Young

	Name:	 	Joseph P. Young
	Title:	 	Authorized Signatory

  

			
	NATIONWIDE INDEMNITY COMPANY
		
	By:	 	 /s/ Joseph P. Young

	Name:	 	Joseph P. Young
	Title:	 	Authorized Signatory

 [Signature Page to Letter Amendment to 2000 Banes Note Agreement] 

 Acknowledged and agreed as of the date first written above: 
  

			
	 BARNES GROUP INC.

		
	By:	 	 /s/ Lawrence W. O’Brien

	Name:	 	Lawrence W. O’Brien
	Title:	 	Vice President and Treasurer
		
	By:	 	 /s/ William C. Denniger

	Name:	 	William C. Denninger
	Title:	 	Senior Vice President, Finance and Chief Financial Officer

 [Signature Page to Letter Amendment to 2000 Banes Note Agreement]Management Incentive Compensation Plan

 Exhibit 10.1 
 BARNES GROUP INC. 
 MANAGEMENT INCENTIVE COMPENSATION PLAN 
 Amended and Restated Effective as of July 19,2006 
 SECTION 1. PURPOSE 
 The Management Incentive Compensation Plan (the “MICP”) is designed to provide
incentive compensation opportunities to persons in key positions who contribute importantly to the success of Barnes Group Inc. (the “Company”). 
 SECTION 2. ADMINISTRATION 
 The MICP shall be administered by the Compensation Committee of the Board of Directors of
the Company, or its successor (the “Committee”). Amounts paid or projected to be paid under the MICP are referred to herein as “Awards.” 
 SECTION 3. DEFINITIONS 
  

	3.1	“Award Period” shall mean the period of time within which Performance is measured for the purpose of determining whether an Award has been earned.

  

	3.2	“Business Unit” shall mean a cost center, profit center or international subsidiary within a Group. 

  

	3.3	“Business Unit Fund” shall mean an amount equal to the sum, in the aggregate, of the Individual Targets earned by all of the MICP participants in a Business Unit.

  

	3.4	“CEO” shall mean the President and Chief Executive Officer of the Company. 

  

	3.5	“Company Officer” shall mean an executive officer of the Company elected by its Board of Directors. 

  

	3.6	“Fund” shall mean an amount equal to the sum, in the aggregate, of the Individual Targets earned by all of the MICP participants in a Group. 

  

	3.7	“Group” shall mean the Executive Office, Associated Spring, Bowman Distribution, or Barnes Aerospace. 

  

	3.8	“Group President” shall mean the president of Associated Spring, Bowman Distribution, or Barnes Aerospace. 

  

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	3.9	“Individual Target” shall mean the percentage of salary for each individual participating in the MICP. The Committee will establish the Individual Target for each MICP
participant, by position title, salary grade, or other category before or during the Award Period. 

  

	3.10	“Maximum” shall mean a Performance level at or above which the amount paid or projected to be paid for an Award Period is equal to 300% of the Fund for the corresponding
Group. 

  

	3.11	“Performance” shall mean the performance objectives established by the Committee in advance, with respect to each Group or Business Unit, as the case may be, for an Award
Period, for the purpose of determining whether, and to what extent, an Award has been earned by the Group or Business Unit for an Award Period. Performance may be adjusted by the Committee to include or exclude extraordinary and non-recurring items
or other factors. 

  

	3.12	“Target” shall mean a Performance level at which the amount paid or projected to be paid for an Award Period is equal to 100% of the Fund for the corresponding Group.

  

	3.13	“Threshold” shall mean a Performance level at or above which an Award is earned for an Award Period. For Threshold Performance, the amount paid or projected to be paid for
an Award Period is equal to 25% of the Fund for the corresponding Group. 

 SECTION 4. GROUP FUNDS 
 If an Award Period is a calendar year, prior to March 1, the Committee shall establish the Threshold, Target and Maximum for each Group. The
Committee may also designate one or more intermediate levels of Performance between the Threshold and the Target, and the Target and the Maximum, for a Group, and the percentage of the corresponding Fund that will be available for payment as an
Award if Performance equals such intermediate level. 
  

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 SECTION 5. BUSINESS UNIT FUNDS 
 If an Award Period is a calendar year, prior to May 1, the CEO shall designate which Business Units, if any, shall have separate Business Unit Funds.
For each such Business Unit, the CEO shall also determine the threshold, target and maximum on the same basis as such measures are determined for a Fund. The CEO may also designate intermediate levels of Performance between the threshold and the
target, and the target and the maximum, for the Business Unit and the percentage of the Business Unit Fund that will be available for payment as an Award if Performance equals such intermediate level. 
 SECTION 6. PARTICIPANTS 
 If an Award Period is
a calendar year, at any time before or during the Award Period the CEO may designate eligible participants in the MICP for that Award Period and the respective Funds or Business Unit Funds, as the case may be, in which they shall participate. The
Committee may at any time designate an individual to participate in the MICP for an Award Period and the Fund or Business Unit Fund in which such individual shall participate. Except for participants who retire, die or become permanently disabled
during the Award Period, whose Award shall be prorated to the date of such retirement, death or permanent disability, a person must be employed by the Company or one of its subsidiaries on the date when an Award is paid in order to be eligible to
receive an Award, unless the CEO decides otherwise in individual cases. 
 SECTION 7. AWARDS – BUSINESS UNIT FUNDS 
 After the end of the Award Period and based on the final Performance of each Business Unit for which a Business Unit Fund has been designated pursuant to
Section 5, the CEO, upon the recommendation of the corresponding Company Officer, shall determine each participant’s share of the Business Unit Fund (except for any Company Officer who participates in the Business Unit Fund or the Fund of
the corresponding Group, whose Award shall be determined by the Committee pursuant to Section 8.1). Without limiting the foregoing, the CEO shall have the authority, subject to Section 9, to make adjustments to the amount of any Business
Unit Fund and to adjust or refrain from making an Award to any participant. 
  

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 SECTION 8. AWARDS – GROUP FUNDS 
  

	8.1	After the end of the Award Period and based on the final Performance of each Group, the CEO shall determine each participant’s share of the corresponding Group Fund, upon the
recommendations of the Company Officers (except for any Company Officer who participates in the Fund). The CEO shall recommend the share of the Executive Office Fund for each Company Officer, other than the CEO. The Committee shall approve the Award
to each Company Officer other than the CEO, and determine the appropriate Award for the CEO, based in all instances on Individual Targets and the Performance level achieved. 

  

	8.2	Subject to Section 9, the Committee shall have the authority to make adjustments to the Funds and to adjust or refrain from making an Award including, without limitation,
making an Award to any Company Officer in excess of his or her calculated Award and recommending to the CEO an Award in excess of the calculated Award for any participant who is not a Company Officer. 

 SECTION 9. AWARDS ABOVE MAXIMUM 
 Notwithstanding anything in the MICP to the contrary, no awards in excess of the Maximum shall be made to any person without the approval of the Committee. 
 SECTION 10. PAYMENT 
 Awards shall be paid within 60 days after the expiration of the Award
Period, unless otherwise decided by the Committee. 
 SECTION 11. GENERAL 
  

	11.1	The interpretation of the MICP by the Committee and its decisions on all questions arising under the MICP shall be conclusive and binding on all participants and the CEO.

  

	11.2	The MICP may be amended at any time, including retroactively, by the Committee. 

  

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	11.3	This amendment and restatement of the MICP supersedes all prior MICP and similar incentive plans, effective as of January 1, 2000 for the Award Period of calendar year 2000 and
Award Periods thereafter. 

 Amended 
 02/17/95 
 02/20/96 
 07/20/98 
 04/11/00 
 12/12/01 
 07/19/06 
  

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