3a thread class right-hand 2.1500" overall length 0.2500" bore diameter 24 thread quantity per inch cadmium all external/exposed metal surfaces surface treated single row, concave rollers unjf thread series
3a thread class right-hand 1.9530" overall length 0.1900" bore diameter 28 thread quantity per inch cadmium all external/exposed metal surfaces surface treated double row, staggered, ball unf thread series