A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6105-01-305-8334
NSN 5930-01-177-1607
NSN 5905-01-364-6896
NSN 6645-01-365-1511
NSN 6620-00-443-1885
NSN 2925-00-095-9451
NSN 5965-01-509-7732
NSN 6620-01-097-1038
NSN 6645-00-200-2322
NSN 5960-01-142-1995
NSN 5998-01-614-5032
NSN 5990-01-089-9694