A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5945-00-096-2993
NSN 6130-01-656-7579
NSN 5990-01-472-2447
NSN 6135-01-217-3292
NSN 5990-01-021-3665
NSN 5945-00-726-3429
NSN 6135-00-488-4478
NSN 5999-00-445-4043
NSN 5930-00-831-2977
NSN 6620-01-094-6549
NSN 5925-01-074-8589
NSN 6130-01-007-4611