Description:

Size: 5/16 inch-18. 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.