Paul, Weiss, Rifkind, Wharton & Garrison LLP

1285 Avenue of the Americas

New York, New York 10019-6064

May 16, 2013

VIA EDGAR AND FEDERAL EXPRESS

Securities and Exchange Commission

Division of Corporate Finance

100 F Street, N.E.

Washington, D.C. 20549

Attention:	Mr. Jay Ingram
	Legal Branch Chief

Re: Global Brass and Copper Holdings, Inc.

Amendment No. 6 to the Registration Statement on Form S-1

May 8, 2013

File No. 333-177594

Dear Mr. Ingram:

On behalf of Global Brass and Copper Holdings, Inc., a Delaware corporation (the “Company”), we hereby furnish to the Staff of the Commission (the “Staff”) the following items to assist in the Staff’s review of the Company’s response to Comment No. 4 to the Staff’s comment letter dated May 9, 2013. The Company’s response was filed, together with Amendment No. 7 to the Company’s Registration Statement on Form S-1, on May 13, 2013: a schedule of debits and credits for (1) toll transactions in which the customer procures its own metal, (2) toll transactions in which the customer asks the Company to procure the metal and sell the metal to the customer and (3) non-toll transactions, collectively attached as Annex A to the supplemental material furnished to the Staff (the “Supplement”).

The Company is furnishing the Supplement to the Staff under separate cover pursuant to Rule 418 under the Securities Act of 1933, as amended, and kindly asks the Staff to destroy the Supplement and all annexes or return it to the Company following its review thereof.

If you have any questions regarding the foregoing, please do not hesitate to call the undersigned at (212) 373-3052.

Sincerely,

/s/ Lawrence G. Wee

Lawrence G. Wee

cc: Scott Hamilton

Global Brass and Copper Holdings, Inc.

LizabethAnn R. Eisen

Andrew J. Pitts

Cravath, Swaine & Moore LLP

Annex A (Supplement)

[Furnished to the Staff under separate cover]