A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6105-00-469-2269
NSN 5990-01-079-3271
NSN 6145-01-029-4184
NSN 6105-01-341-6142
NSN 5999-00-450-1817
NSN 6650-00-959-6869
NSN 5945-00-338-3733
NSN 5855-01-513-8367
NSN 6645-00-329-2484
NSN 5996-01-265-8621
NSN 6130-00-410-3149
NSN 5975-00-647-4968