A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5945-01-056-5540
NSN 7035-01-602-9350
NSN 6610-01-334-6569
NSN 7035-01-462-5766
NSN 5905-01-025-6949
NSN 5950-01-447-6105
NSN 5835-00-733-9145
NSN 4140-00-727-3731
NSN 5960-01-195-2166
NSN 6150-01-329-3682
NSN 6650-01-119-0718
NSN 5999-00-982-8054