A headed externally threaded fastener whose threaded portion is of one nominal diameter, with a square neck directly beneath the head.
NSN 5998-01-173-0686
NSN 6150-00-931-2052
NSN 6240-00-474-5809
NSN 5985-01-644-0652
NSN 5935-00-661-0825
NSN 5920-00-786-0112
NSN 5835-01-364-6830
NSN 5925-00-442-1943
NSN 5996-00-079-1268
NSN 6650-01-481-8009
NSN 5965-00-894-0015
NSN 5855-01-092-7755