A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6105-00-991-1844
NSN 5999-00-758-7385
NSN 6645-00-795-5565
NSN 6645-01-296-2301
NSN 6105-01-598-4055
NSN 5915-01-382-9383
NSN 6610-00-901-5137
NSN 5855-00-167-7893
NSN 5920-01-220-3037
NSN 5945-00-415-4010
NSN 5855-01-013-6864
NSN 5855-00-487-9691