A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 7035-01-611-2388
NSN 6130-01-192-1329
NSN 6610-01-461-8180
NSN 6650-00-668-5703
NSN 6685-01-053-8297
NSN 6240-00-223-9100
NSN 6130-01-075-7726
NSN 6240-01-344-7134
NSN 5910-01-537-5996
NSN 6130-01-303-5116
NSN 5985-01-026-8955
NSN 5915-01-656-7057