A headed externally threaded fastener whose threaded portion is of one nominal diameter, with a square neck directly beneath the head.
NSN 6110-00-663-4054
NSN 5998-00-231-9658
NSN 5950-00-225-8474
NSN 5895-01-340-7347
NSN 6110-01-254-3485
NSN 6645-00-664-4665
NSN 5965-00-970-6431
NSN 5855-00-361-0167
NSN 6145-01-548-8854
NSN 5975-00-759-4860
NSN 5855-00-011-5816
NSN 5960-01-020-6316