A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5935-01-066-8355
NSN 6145-01-151-0238
NSN 5935-01-458-2706
NSN 6220-00-050-0191
NSN 6685-00-338-8983
NSN 6620-01-338-6073
NSN 6650-01-143-4586
NSN 6150-01-100-4337
NSN 6240-01-466-2680
NSN 6105-00-468-6323
NSN 6645-01-023-2180
NSN 5925-01-434-3988