A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 6685-01-356-5930
NSN 5910-00-774-4654
NSN 5990-01-259-7138
NSN 6130-01-588-1740
NSN 6645-00-902-2522
NSN 6220-00-389-6215
NSN 5855-01-147-4785
NSN 7035-01-594-9198
NSN 5835-00-933-9609
NSN 6220-00-542-4898
NSN 6685-00-118-3625
NSN 5835-01-449-7511