A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5905-00-230-7580
NSN 7035-01-246-3086
NSN 5935-00-507-3593
NSN 6130-01-149-9148
NSN 6610-01-322-4331
NSN 5895-01-222-1426
NSN 6620-01-527-4423
NSN 4140-00-385-2925
NSN 5985-01-327-5081
NSN 7035-01-019-3951
NSN 5920-01-195-7254
NSN 5905-01-528-6987