A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5975-00-829-4113
NSN 6105-01-098-8381
NSN 5835-00-140-5291
NSN 5895-01-050-5813
NSN 6110-01-362-0298
NSN 6645-01-227-2036
NSN 6105-01-194-4877
NSN 6610-01-553-8726
NSN 6610-00-961-7263
NSN 5960-01-017-5449
NSN 5915-01-522-5577
NSN 5910-01-330-4774