A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5998-01-429-8887
NSN 5910-01-655-7712
NSN 5985-01-423-8837
NSN 6220-01-123-5139
NSN 5965-01-153-1965
NSN 5975-01-359-4810
NSN 6105-00-761-1290
NSN 5965-01-254-6527
NSN 5835-01-571-4083
NSN 5990-00-761-3754
NSN 4140-01-386-5630
NSN 5960-00-195-4554