A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5915-01-363-5302
NSN 6685-00-480-6538
NSN 7035-00-270-5519
NSN 5835-01-495-0595
NSN 5895-01-514-2948
NSN 5910-01-244-9384
NSN 5905-01-025-0281
NSN 5950-00-526-0658
NSN 4140-01-513-9139
NSN 5975-00-106-6145
NSN 5920-01-171-4902
NSN 5960-00-107-6182