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 6685-01-218-6512
NSN 5915-00-106-0308
NSN 2925-01-422-1542
NSN 6110-01-519-1859
NSN 5920-01-394-4452
NSN 5910-01-432-8930
NSN 6645-01-064-2749
NSN 7035-01-607-0415
NSN 2925-00-934-8383
NSN 5965-01-429-9777
NSN 5915-01-092-5575
NSN 6240-00-968-9274