3b thread class right-hand 1.7650" overall length 0.2495" bore diameter 20 thread quantity per inch 0.0700 in. dia. hole drilled in shank 0.0625 in. from base to hole center cadmium surface treated ball type unc thread series
3b thread class right-hand 2.7810" overall length 0.4995" bore diameter 20 thread quantity per inch 0.0700 in. dia hole drilled in shank at right angle to longitudinal axis, 0.5940 in. from base ball type unf thread series