A headed externally threaded fastener whose threaded portion is of one nominal diameter, with a square neck directly beneath the head.
NSN 6135-01-382-1980
NSN 5985-01-090-5794
NSN 5905-00-222-2338
NSN 5999-00-914-1774
NSN 7035-00-529-3128
NSN 5895-00-141-9127
NSN 5965-01-515-2009
NSN 5985-01-046-9031
NSN 5905-01-411-1499
NSN 5985-00-086-9364
NSN 5895-00-981-9838
NSN 6620-01-199-3261