Rockwell hardness on stud end
A headless fastener not exceeding 12 inches (304.8 mm) in length, threaded externally on both ends on which the nominal diameter of one threaded section is greater than the other. The unthreaded section must have more than one diameter, none of which may be larger than the maximum major diameter of the larger thread. It may be thread relieved. Excludes items with tapered threads.
NSN 6220-01-222-0724
NSN 5990-01-443-2931
NSN 5960-01-088-9090
NSN 6645-00-915-1817
NSN 5910-00-999-2414
NSN 5975-01-531-5275
NSN 5920-01-409-2830
NSN 6105-01-528-8027
NSN 6105-01-581-5495
NSN 5950-01-451-4538
NSN 6145-01-556-9546
NSN 6685-01-472-2413