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 6610-01-657-1773
NSN 5990-01-604-0862
NSN 5930-01-648-0976
NSN 5998-01-163-5558
NSN 6645-00-895-1515
NSN 6130-00-325-0748
NSN 5950-01-586-3648
NSN 7035-01-144-1868
NSN 5915-01-418-1843
NSN 6620-01-512-8146
NSN 5925-00-337-8138
NSN 5998-01-289-9429