A headed externally threaded fastener whose threaded portion is of one nominal diameter, with a square neck directly beneath the head.
NSN 5996-01-474-3726
NSN 5985-01-408-2083
NSN 6650-00-137-3845
NSN 5935-01-135-2069
NSN 5950-01-607-1079
NSN 5985-00-417-3547
NSN 6150-00-291-6847
NSN 6105-00-287-8971
NSN 5915-00-622-0390
NSN 5960-01-523-9098
NSN 5985-01-441-8471
NSN 5905-01-162-0737