A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5990-01-501-5409
NSN 5950-01-310-6883
NSN 5999-01-579-3601
NSN 5905-01-364-8594
NSN 5945-00-631-3565
NSN 5950-00-156-7287
NSN 6105-01-462-3628
NSN 6645-00-287-9192
NSN 6610-01-357-4345
NSN 6150-01-298-0536
NSN 6145-01-430-2784
NSN 5965-01-408-5990