A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6220-00-948-1034
NSN 6650-01-412-1490
NSN 6105-01-422-3765
NSN 5960-01-125-2356
NSN 5855-00-293-4708
NSN 5835-01-074-1161
NSN 5855-01-223-0833
NSN 5905-00-842-8964
NSN 5999-01-381-1846
NSN 5999-01-532-4854
NSN 5965-01-459-7311
NSN 5905-00-402-7473