A headed externally threaded fastener whose threaded portion is of one nominal diameter, with a square neck directly beneath the head.
NSN 5975-01-417-1752
NSN 5915-00-144-5548
NSN 5960-01-128-0850
NSN 6620-01-232-8550
NSN 5999-01-310-6176
NSN 5998-01-117-0882
NSN
NSN 5998-01-462-0025
NSN 6650-00-840-9758
NSN 6320-01-564-0893
NSN 6610-01-398-8815
NSN 5960-00-938-7569