A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6135-01-363-5109
NSN 5895-01-655-7397
NSN 5895-00-083-8537
NSN 6105-00-913-2477
NSN 4140-01-036-3114
NSN 6320-01-176-8367
NSN 5920-00-204-8125
NSN 5990-01-623-0082
NSN 5905-01-118-2435
NSN 6105-00-516-2151
NSN 5960-01-531-9108
NSN 6135-00-087-5300