A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5960-00-420-0418
NSN 6240-01-649-6937
NSN 6110-00-938-8701
NSN 5945-01-431-2349
NSN 5905-00-840-0300
NSN 6110-01-150-4961
NSN 5895-00-913-9767
NSN 5930-00-524-2150
NSN 6105-00-112-9099
NSN 5960-01-454-7064
NSN 6645-00-392-8728
NSN 5945-01-553-3644