Fastenal 4253-029: 1/4"-28 Astm A563 Grade a Zinc Finish Steel Jam Nut


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Carbon steel Grade A hex jam nut with a zinc finish, 1/4"-28 fine full-thread right-hand thread, 7/16" wrench size, 0.150"-0.163" nut thickness, and 0.428"-0.438" head width. Meets ASME B18.2.2, ASTM A563, ASTM F1941/F1941M, and HRB 68 requirements.