A hardened cylindrical fastener with multiple spiral flutes on its shank. It also has an end smaller in diameter than the outside diameter of the spiral flutes, which acts as a pilot when driven into a drilled hole.
NSN 6220-00-166-9796
NSN 6240-01-412-0715
NSN 5925-00-706-9975
NSN 7035-01-337-1729
NSN 5960-00-376-0277
NSN 2925-01-423-8141
NSN 6240-01-371-0978
NSN 7035-01-528-7095
NSN 5996-01-248-0947
NSN 5895-01-166-8046
NSN 6130-01-419-0328
NSN 6145-00-181-9622