A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6105-01-326-1315
NSN 5915-01-336-0813
NSN 5895-00-781-2255
NSN 5985-01-339-2001
NSN 6145-00-134-0841
NSN 4140-01-341-6024
NSN 5930-01-454-4009
NSN 6645-01-358-7485
NSN 5935-01-423-9277
NSN 5985-01-182-5864
NSN 5930-01-044-7561
NSN 7035-00-834-2090