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 5960-01-142-1995
NSN 5855-01-320-7640
NSN 4140-00-103-2449
NSN 5925-01-326-4411
NSN 5999-01-420-8095
NSN 5990-01-217-1550
NSN 5920-01-207-4729
NSN 5998-01-153-2689
NSN 5855-00-198-3197
NSN 6620-01-507-5283
NSN 5950-00-776-4701
NSN 6105-00-370-0847