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 5999-01-622-6213
NSN 5835-01-606-8768
NSN 5965-01-252-8701
NSN 5960-01-148-5859
NSN 5910-01-338-9431
NSN 5935-01-313-1428
NSN 6110-00-008-4333
NSN 6240-01-162-4086
NSN 5990-00-249-7887
NSN 6620-00-557-7008
NSN 5905-01-479-3063
NSN 5925-01-035-3151