Prime-Line 9073565 Finished Hex Nuts, 1/2 in.-13, A563 Grade A Zinc Plated Steel (50 Pack)

Size: 1/2 inch-13 | Most commonly used and versatile nut | Finished nuts are six sided nuts of standard thickness vs heavy duty hex nuts | Screws onto a bolt, cap screw or threaded rod of the same thread size | Use with washers to help distribute the load (not included) | Thread Type: Coarse, Thread Class: UNC-2B | Specification(s) Met: ASME B18.2.2 and ASTM A563 Gr A