A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 7035-01-014-3808
NSN 6240-00-263-0549
NSN 5920-01-295-0440
NSN 6130-01-003-6132
NSN 5999-00-004-9956
NSN 6150-00-205-2490
NSN 6610-01-072-7922
NSN 6320-01-352-8084
NSN 6150-01-594-3680
NSN 5998-00-242-0468
NSN 6135-00-474-1397
NSN 6105-01-336-1471