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 4140-01-261-2966
NSN 6220-01-150-4920
NSN 5905-01-368-1704
NSN 6685-01-454-2380
NSN 5998-01-274-6787
NSN 5996-01-375-3723
NSN 6650-01-131-0323
NSN 6220-00-772-9791
NSN 5915-00-007-7138
NSN 6130-00-957-4815
NSN 5985-01-247-6950
NSN 6620-01-299-8949