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 4140-01-596-2105
NSN 5965-00-651-4350
NSN 5915-01-500-2147
NSN 5920-00-848-3043
NSN 5985-01-023-8011
NSN 5998-00-199-7488
NSN 5965-01-186-2051
NSN 5945-01-438-5273
NSN 6650-01-378-7875
NSN 4140-00-269-5795
NSN 5835-00-491-6075
NSN 6650-01-044-6179