A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6685-01-451-4796
NSN 5835-01-558-9444
NSN 6145-01-616-5800
NSN 5999-00-844-9166
NSN 5855-00-149-0766
NSN 6145-00-438-8979
NSN 5855-00-149-0766
NSN 5930-01-260-2933
NSN 2925-00-278-9468
NSN 6135-00-080-9176
NSN 5950-01-029-3579
NSN 6110-00-107-8524