A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6130-01-625-2241
NSN 5935-01-620-6514
NSN 5920-01-153-7487
NSN 6105-01-108-3643
NSN 6650-01-164-9136
NSN 5975-01-423-8507
NSN 5999-01-351-4902
NSN 6135-01-581-8163
NSN 5930-01-378-5646
NSN 5935-01-564-8811
NSN 5999-01-535-6964
NSN 5910-01-527-6843