Exhibit 32.1

Certification of Chief Executive Officer Pursuant to 18 U.S.C. Section 1350, as Adopted to Section 906 of the Sarbanes-Oxley Act of 2002

I, John P. Williamson, President and Chief Executive Officer of Atkore International Holdings Inc. (“the Company”), hereby certify, pursuant to 18 U.S.C. Section 1350, as Adopted pursuant to Section 906 of the Sarbanes-Oxley Act of 2002, that:

(1) The Annual Report on Form 10-K of the Company for the year ended September 28, 2012 (the “Report”), as filed with the Securities and Exchange Commission, fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 (15 USC. 78m or 78o(d)); and

(2) The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Company.

Date: December 11, 2013	/s/ John P. Williamson
	John P. Williamson
	President and Chief Executive Officer (Principal Executive Officer)