A headed externally threaded fastener whose threaded portion is of one nominal diameter, with a square neck directly beneath the head.
NSN 4140-01-060-2960
NSN 5975-01-462-0700
NSN 5905-00-709-8638
NSN 5975-01-338-9486
NSN 5990-00-269-2226
NSN 6685-01-032-4752
NSN 5895-01-026-1088
NSN 4140-01-448-0120
NSN 5998-01-574-8911
NSN 7035-00-104-7613
NSN 5930-01-533-4846
NSN 5910-00-558-7473