A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5945-01-195-3498
NSN 6610-01-078-9238
NSN 6685-01-225-8594
NSN 5935-00-833-8210
NSN 5905-00-964-5784
NSN 5895-01-428-5881
NSN 5965-01-253-0451
NSN 6610-01-352-6344
NSN 5925-01-072-3867
NSN 5945-00-250-7911
NSN 5965-01-105-7901
NSN 5905-01-430-0375