Size: 1/4 inch-28. Standard hex nut with a slotted round section on one end. Can be locked into place by inserting a cotter pin through the slots and a hole in the fastener. 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: Fine, Thread Class: UNF-2B. Specification(s) Met: ASME B18.2.2 and ASME 1.1.
