A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5935-00-446-8811
NSN 6240-01-032-7095
NSN 5960-00-583-4902
NSN 6620-01-462-0001
NSN 5996-01-020-5759
NSN 6220-01-479-1289
NSN 5925-01-092-5018
NSN 2925-01-415-0264
NSN 5999-00-358-1933
NSN 5996-00-231-9322
NSN 5985-00-115-2071
NSN 6130-01-642-0300