A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5999-01-319-5064
NSN 5999-00-597-2979
NSN 5996-01-227-4496
NSN 5935-01-359-5470
NSN 6240-00-201-1200
NSN 6320-01-478-9351
NSN 7035-00-361-5975
NSN 6130-01-430-0261
NSN 5920-01-589-9313
NSN 5999-01-157-9519
NSN 6135-00-505-0679
NSN 5999-00-665-5261