A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5999-01-607-0486
NSN 6240-01-168-6185
NSN 6150-01-292-2749
NSN 5935-01-004-2485
NSN 5895-00-027-9888
NSN 6610-00-305-5447
NSN 6240-01-303-2395
NSN 5950-00-945-1045
NSN 5990-01-352-5255
NSN 7035-01-388-6943
NSN 6145-00-909-0614
NSN 6220-01-424-7986