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 5905-00-325-7031
NSN 5998-00-372-6047
NSN 6610-00-951-0345
NSN 5930-00-271-2382
NSN 6110-01-391-8871
NSN 5835-01-498-9410
NSN 5950-01-436-8807
NSN 6220-00-299-7426
NSN 5905-01-460-4795
NSN 5965-01-633-8849
NSN 5925-01-517-5466
NSN 5996-01-514-9292