A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5905-01-499-6504
NSN 5920-01-264-8238
NSN 6105-01-183-3135
NSN 6145-01-504-3785
NSN 6150-00-373-9765
NSN 5925-01-377-2285
NSN 6645-01-309-6455
NSN 6650-01-398-1387
NSN 5935-01-467-1850
NSN 5960-01-413-3877
NSN 5990-01-272-4091
NSN 5930-01-502-6902