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 7035-01-455-7277
NSN 6220-01-156-4564
NSN 7035-00-371-7749
NSN 6150-01-152-0331
NSN 5945-01-480-0032
NSN 5985-00-280-2190
NSN 6320-01-270-1419
NSN 5895-00-631-1188
NSN 6620-01-298-0991
NSN 6130-01-394-4986
NSN 5975-01-128-0821
NSN 6220-01-605-1346