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 4140-01-477-6030
NSN 5915-00-679-1989
NSN 5945-01-463-8459
NSN 6110-01-290-4289
NSN 6150-01-444-2430
NSN 5999-01-449-1955
NSN 5930-00-954-0741
NSN 5905-01-348-1157
NSN 5915-01-461-9190
NSN 6320-01-513-9166
NSN 6135-01-370-2599
NSN 4140-00-991-8849