A headed externally threaded fastener whose threaded portion is of one nominal diameter, with a square neck directly beneath the head.
NSN 6645-00-991-0877
NSN 5905-00-350-4105
NSN 5935-01-498-9358
NSN 6685-00-141-4300
NSN 5996-00-548-8762
NSN 5920-01-527-5388
NSN 7035-01-053-0535
NSN 5915-01-107-8875
NSN 5945-00-222-6712
NSN 6220-00-691-2409
NSN 5855-01-242-2572
NSN 5998-01-574-0990