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 6240-00-929-0585
NSN 5915-00-545-7479
NSN 6220-00-146-3226
NSN 5975-01-515-1150
NSN 6645-01-034-0469
NSN 6685-01-357-4909
NSN 5915-01-415-3100
NSN 6320-01-304-3639
NSN 5985-00-270-4509
NSN 5855-01-417-3250
NSN 5945-00-695-6340
NSN 5996-01-126-7238