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 6320-00-450-7014
NSN 6320-01-078-8257
NSN 5960-01-057-4058
NSN 4140-01-453-9823
NSN 6650-00-578-6543
NSN 5835-00-074-3700
NSN 5910-01-321-4319
NSN 4140-01-426-8428
NSN 5930-01-274-1171
NSN 5950-01-455-4578
NSN 5925-01-553-7746
NSN 6110-01-506-4676