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 5999-01-538-3202
NSN 6650-01-406-0665
NSN 6320-01-054-3046
NSN 6145-01-406-1679
NSN 5990-01-097-4721
NSN 5985-00-155-5991
NSN 5920-00-413-3341
NSN 5915-01-338-2202
NSN 6240-01-040-8897
NSN 6650-00-061-2232
NSN 6150-00-242-9439
NSN 5905-01-104-4590