2a thread class left-hand 3.3750" overall length 0.6245" bore diameter 16 thread quantity per inch chromium inner member surface treated ball type unf thread series
0.1406" overall width 0.1250" bore diameter bore calibrated in increments of 0.0001 in. odcalibrated 0.00000 to 0.00015 in. non-loading groove, non-separable