12.0mm overall width 20.0mm bore diameter electric motor grade, special noise requirement, grease fill 30 to 35 percent non-loading groove, non-separable
3a thread class left-hand 2.3700" overall length 0.2495" bore diameter 24 thread quantity per inch internal clearance 0.0002 in. min 0.00010 in. max cadmium all external/exposed metal surfaces surface treated single row, concave rollers unjf thread series
1.8130" bore diameter 0.0005 in. to 0.0010 in. radial clearance cadmium all external/exposed metal surfaces surface treated single row inner ring extended both sides