A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6145-01-028-9984
NSN 6110-01-217-3096
NSN 6620-01-026-7371
NSN 5945-00-794-2478
NSN 6645-00-790-0944
NSN 5905-01-249-1173
NSN 6105-01-512-8752
NSN 6105-00-045-3700
NSN 5855-00-149-0766
NSN 5930-01-158-4915
NSN 6610-01-240-3427
NSN 6130-01-560-3800