A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5930-01-049-1886
NSN 5915-00-299-2105
NSN 5945-01-303-6361
NSN 5935-00-958-3527
NSN 6645-01-592-2557
NSN 5930-01-509-5560
NSN 5910-01-526-4474
NSN 5985-01-198-8299
NSN 6110-00-359-5571
NSN 5925-00-913-6165
NSN 6645-00-108-6479
NSN 5985-01-029-4624