A cylindrically-shaped headed item, having circular or longitudinal groove(s).
NSN 5935-01-185-9932
NSN 5960-00-067-3954
NSN 5910-01-258-8716
NSN 5910-01-433-2278
NSN 6220-01-615-3608
NSN 6110-00-982-9714
NSN 5985-00-682-4337
NSN 6220-00-488-8872
NSN 5895-00-530-5310
NSN 5920-01-129-4970
NSN 5935-01-192-8839
NSN 5990-00-091-0669