A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6320-01-453-2358
NSN 5920-01-247-6474
NSN 5990-01-242-4493
NSN 7035-01-656-8917
NSN 6220-00-987-1694
NSN 6320-01-504-3948
NSN 5925-01-293-5039
NSN 5975-01-304-8530
NSN 6130-00-222-1167
NSN 6320-01-116-3980
NSN 5999-01-090-0664
NSN 6105-01-399-7686