A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5960-01-437-7422
NSN 6220-00-257-2655
NSN 5835-01-573-8449
NSN 6130-01-181-4535
NSN 4140-01-650-2700
NSN 2925-01-163-6716
NSN 5999-00-880-5760
NSN 5910-00-253-3992
NSN 6240-01-446-7851
NSN 5905-01-634-0595
NSN 5915-01-563-1323
NSN 5950-00-419-1479