A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5835-01-017-7486
NSN 5930-00-399-0168
NSN 5835-01-540-4995
NSN 5920-00-529-0618
NSN 5999-01-572-9661
NSN 5920-00-497-1916
NSN 6145-01-424-8484
NSN 5998-01-399-6421
NSN 5975-00-411-6294
NSN 5998-01-422-2058
NSN 5998-00-249-1843
NSN 5990-01-565-2226