A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5935-01-495-8870
NSN 6105-00-142-5901
NSN 6110-00-583-3911
NSN 7035-01-158-7673
NSN 5930-01-349-0273
NSN 5905-01-015-3529
NSN 7035-01-487-6481
NSN 5835-01-397-2865
NSN 5895-00-861-6067
NSN 6220-01-304-7500
NSN 5999-01-322-5970
NSN 6620-01-401-5356