A headed externally threaded fastener whose threaded portion is of one nominal diameter, with a square neck directly beneath the head.
NSN 5915-01-531-8726
NSN 5998-01-488-4553
NSN 5920-00-803-3290
NSN 5910-00-647-4059
NSN 6240-00-988-8748
NSN 5855-01-492-6913
NSN 7035-01-438-2108
NSN 5895-01-180-1452
NSN 6610-00-863-8082
NSN 5855-00-089-3974
NSN 6320-01-052-2118
NSN 5950-01-435-3387