A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6110-01-083-8317
NSN 6610-00-758-3486
NSN 5945-00-228-2976
NSN 5915-01-518-9310
NSN 6220-00-819-9325
NSN 6150-00-483-1880
NSN 6650-00-185-8298
NSN 6105-01-206-3352
NSN 6620-01-412-0938
NSN 6610-00-929-4754
NSN 2925-01-364-7926
NSN 5930-00-021-2948