Atkore (ATKR) 10-K2023 FY Annual report

Exhibit 32.2

CERTIFICATION PURSUANT TO

18 U.S.C. SECTION 1350, AS ADOPTED PURSUANT TO

SECTION 906 OF THE SARBANES-OXLEY ACT OF 2002

I, David P. Johnson, the Chief Financial Officer of Atkore Inc., certify that (i) the Annual Report on Form 10-K for the fiscal year ended September 30, 2023, fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934 and (ii) the information contained in such Annual Report on Form 10-K fairly presents, in all material respects, the financial condition and results of operations of Atkore Inc.