A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5960-01-516-7264
NSN 6145-01-583-9733
NSN 6610-01-458-3119
NSN 5975-00-008-2739
NSN 6110-00-189-6939
NSN 6130-01-020-9004
NSN 6110-01-149-2839
NSN 6105-00-246-4425
NSN 6610-00-639-3615
NSN 6240-01-616-6813
NSN 5990-00-780-7843
NSN 5945-01-142-3321