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 6145-01-565-3201
NSN 5925-01-189-9254
NSN 5985-01-659-4790
NSN 6610-01-483-9810
NSN 6240-01-076-1793
NSN 5925-01-224-7031
NSN 2925-01-197-7864
NSN 5990-01-065-0492
NSN 5910-01-312-4725
NSN 6145-00-806-0161
NSN 5925-01-447-0736
NSN 5950-01-216-3639