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 5975-01-136-4988
NSN 5930-00-690-4603
NSN 6130-01-254-3260
NSN 6645-01-025-1002
NSN 4140-01-036-4647
NSN 5910-00-828-9038
NSN 5910-00-905-1603
NSN 5960-01-433-7565
NSN 5920-00-998-5742
NSN 5950-01-478-6049
NSN 4140-01-134-8260
NSN 5935-01-660-8905