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 4140-01-119-2879
NSN 6220-01-463-7490
NSN 5835-00-286-5432
NSN 5855-01-406-4821
NSN 6610-01-283-6739
NSN 5998-01-468-0336
NSN 5855-01-596-2634
NSN 5990-00-226-1152
NSN 5960-00-557-6927
NSN 5990-01-315-3754
NSN 6220-00-929-6069
NSN 6220-01-323-9242