Finished hex nuts are the most widely used nuts and will work for most applications.
2, ASME B1.Size: 5/8 inch-11Most commonly used and versatile nutFinished nuts are six sided nuts of standard thickness vs heavy duty hex nutsScrews onto a bolt, cap screw or threaded rod of the same thread sizeUse with washers to help distribute the load (not included)Thread Type: Coarse, Thread Class: UNC-2BSpecification(s) Met: ASME B 18.2.1, & SAE J995.