A headed externally threaded fastener whose threaded portion is of one nominal diameter, with a square neck directly beneath the head.
NSN 6135-01-633-8502
NSN 5990-00-919-2110
NSN 6685-01-426-8929
NSN 5960-00-871-3950
NSN 5935-01-227-0990
NSN 6220-01-320-2641
NSN 5935-00-917-9635
NSN 5855-01-085-5354
NSN 5930-00-516-1217
NSN 5855-01-208-1471
NSN 5996-01-590-7886
NSN 5960-01-139-0293