A headed externally threaded fastener whose threaded portion is of one nominal diameter, with a square neck directly beneath the head.
NSN 6610-01-649-5326
NSN 5835-01-485-0210
NSN 5920-01-212-1536
NSN 5835-01-538-1804
NSN 6220-00-605-0404
NSN 5835-01-442-6482
NSN 5930-01-474-0184
NSN 6645-01-596-6077
NSN 7035-01-027-1718
NSN 6620-01-563-6862
NSN 5985-00-858-1290
NSN 5925-00-343-6747