A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5999-00-939-9342
NSN 5999-00-986-4243
NSN 5835-01-466-5496
NSN 5975-01-093-3890
NSN 5990-00-518-3195
NSN 6105-00-872-7009
NSN 6105-01-539-5332
NSN 6135-01-611-7973
NSN 6105-01-518-5313
NSN 5999-00-553-9831
NSN 7035-01-215-2449
NSN 6650-01-397-5471