A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5930-01-479-2235
NSN 5905-00-263-3453
NSN 6145-01-229-4136
NSN 5985-00-195-6412
NSN 5998-01-634-0604
NSN 6130-01-202-0744
NSN 5985-01-212-5631
NSN 5835-01-642-4705
NSN 5855-01-013-6864
NSN 6685-01-449-1451
NSN 5998-00-269-5444
NSN 5960-01-199-1157