3a thread class right-hand 0.500" thread length 2.781" overall length 32 thread quantity per inch cadmium or zinc surface treated round, closed unf thread series
3a thread class right-hand 0.562" thread length 2.844" overall length 28 thread quantity per inch cadmium or zinc surface treated round, closed unf thread series
3a thread class right-hand 0.625" thread length 2.062" overall length 28 thread quantity per inch cadmium or zinc surface treated round, closed unf thread series
2a thread class right-hand 0.875" thread length 2.000" overall length 20 thread quantity per inch cadmium surface treated round, open unc thread series