A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5945-00-782-0297
NSN 5945-00-498-4736
NSN 5855-00-337-3679
NSN 5835-00-283-2814
NSN 5920-00-427-7267
NSN 5925-01-165-9673
NSN 5965-01-487-4479
NSN 5996-00-287-9598
NSN 6105-01-267-8542
NSN 5960-00-546-7533
NSN 6320-01-158-2177
NSN 5930-01-320-9391