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 5990-01-354-1366
NSN 6610-01-613-1831
NSN 5975-00-448-3179
NSN 6645-01-202-7986
NSN 5960-00-960-6805
NSN 5910-01-452-6750
NSN 6105-01-153-2302
NSN 5925-00-615-1778
NSN 5950-01-300-0218
NSN 5915-00-035-8590
NSN 5935-01-251-2134
NSN 5998-01-132-8300