A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5905-00-269-9184
NSN 6620-01-519-2628
NSN 6145-00-908-7678
NSN 6110-01-469-2784
NSN 5895-01-209-1617
NSN 5990-00-960-6310
NSN 5975-00-384-8077
NSN 5950-01-598-9758
NSN 6620-01-138-0089
NSN 5905-01-562-4720
NSN 6320-01-211-6578
NSN 5999-00-252-3207