A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 7035-01-331-5614
NSN 6620-01-313-3755
NSN 6220-00-074-4224
NSN 6610-01-289-2848
NSN 5920-01-278-9239
NSN 5895-01-411-6024
NSN 5925-01-187-4640
NSN 6150-00-683-5349
NSN 7035-01-614-7878
NSN 2925-00-607-4663
NSN 6610-01-503-5656
NSN 6610-01-278-9704