A headed externally threaded fastener whose threaded portion is of one nominal diameter, with a square neck directly beneath the head.
NSN 6105-01-100-4613
NSN 5905-01-520-5396
NSN 5996-00-076-2267
NSN 6105-00-059-3706
NSN 5835-00-055-0953
NSN 5945-00-099-9857
NSN 4140-00-274-9638
NSN 6610-01-142-3633
NSN 6610-01-559-1447
NSN 5945-01-184-5159
NSN 2925-01-327-3069
NSN 4140-01-451-7829