A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5965-01-030-7253
NSN 6130-01-023-7130
NSN 5990-01-154-7296
NSN 5925-01-178-4078
NSN 5998-01-556-7451
NSN 5855-00-916-2236
NSN 5935-01-481-8230
NSN 5930-01-264-1736
NSN 7035-01-232-7263
NSN 5835-01-003-8076
NSN 5920-01-290-3771
NSN 5999-00-798-2157