A headed externally threaded fastener whose threaded portion is of one nominal diameter, with a square neck directly beneath the head.
NSN 6610-01-083-1446
NSN 6620-01-236-0138
NSN 5855-01-254-3041
NSN 5960-01-125-2356
NSN 4140-00-211-5970
NSN 6145-00-578-7522
NSN 6130-01-567-1608
NSN 6105-00-291-0154
NSN 5895-01-022-3221
NSN 6135-00-945-0015
NSN 5895-01-276-0576
NSN 6220-01-450-3518