3a thread class right-hand 5.1650" overall length 0.5000" bore diameter 14 thread quantity per inch with grease fitting cadmium all external/exposed metal surfaces surface treated single row, concave rollers unjf thread series
5.0mm overall width 4.00mm bore diameter 40 pct full of specified lube, selected for electric motor bearing qualities non-loading groove, non-separable
3a thread class right-hand 3.0630" overall length 0.3122" bore diameter 20 thread quantity per inch 0.0004 in. max radial clearance cadmium all external/exposed metal surfaces surface treated double row, staggered, ball unf thread series
3b thread class left-hand 1.8130" overall length 0.3120" bore diameter 24 thread quantity per inch chromium inner member surface treated ball type unf thread series