3a thread class left-hand 3.1370" overall length 0.4370" bore diameter 18 thread quantity per inch chromium inner member surface treated ball type unf thread series
0.5000" bore diameter filled with 40 to 50 pct of specified lubricant cadmium all external/exposed metal surfaces surface treated single row inner ring extended both sides
1.2500" bore diameter no means of relubrication single row ball, internal self-aligning, inner ring extends both sides, with two setscrews in inner ring