A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5960-01-360-4107
NSN 6105-01-123-1937
NSN 2925-00-789-1106
NSN 6610-00-137-3959
NSN 5945-01-256-7063
NSN 6650-01-016-0406
NSN 6240-00-364-0850
NSN 5999-01-484-5205
NSN 6110-01-411-6608
NSN 6220-01-023-3179
NSN 5910-01-221-8090
NSN 5999-01-499-1988