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 5985-01-127-4944
NSN 6150-01-353-9167
NSN 5925-01-448-3965
NSN 4140-01-287-4863
NSN 5915-01-450-9285
NSN 6620-01-494-0345
NSN 6610-01-214-6680
NSN 6135-00-851-8575
NSN 2925-01-633-4048
NSN 6610-01-245-8015
NSN 2925-01-455-1270
NSN 6320-01-352-5653