0.5000" overall width 4.0000" bore diameter kaydon precision class 6; heat stabilized for operation from minus 65 deg f to plus 250 deg f non-loading groove, non-separable
1.0000" overall width 25.00mm bore diameter as differentiated by material which must conform to ships parts control center special quality control provisions non-loading groove, non-separable
15.00mm overall width 25.00mm bore diameter electric motor quality; races heat stabilized for operation at 390 degrees f non-loading groove, non-separable