A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5960-01-410-8177
NSN 5960-01-217-4526
NSN 6105-01-246-5831
NSN 6610-00-098-5362
NSN 5999-01-516-1762
NSN 5910-01-127-3768
NSN 4140-01-054-3553
NSN 5915-00-725-8399
NSN 6685-01-251-8938
NSN 5915-01-592-4639
NSN 5945-01-007-6742
NSN 5950-00-983-8127