A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6620-01-469-7828
NSN 5950-01-585-8855
NSN 5915-01-609-1425
NSN 5935-00-753-7895
NSN 6110-01-566-9819
NSN 5905-01-427-3804
NSN 5905-01-306-3858
NSN 6110-01-606-3584
NSN 5835-00-779-2836
NSN 6320-01-462-2295
NSN 5905-01-153-2512
NSN 4140-01-143-5397