A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5935-01-340-8460
NSN 6610-01-169-1866
NSN 5998-01-217-1754
NSN 5925-00-104-8310
NSN 5960-01-411-5899
NSN 6645-00-200-2322
NSN 5920-01-416-8756
NSN 5999-01-527-3852
NSN 6610-01-497-7806
NSN 2925-00-938-3797
NSN 5935-01-156-5794
NSN 5855-00-610-4052