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 5950-01-308-7583
NSN 5990-01-100-1840
NSN 7035-01-321-1555
NSN 6145-00-683-5353
NSN 5965-01-229-0786
NSN 5985-01-519-9295
NSN 6150-00-242-8130
NSN 6130-01-039-8726
NSN 2925-01-148-7646
NSN 6150-00-150-8838
NSN 5920-00-074-4654
NSN 5910-00-964-7508