2a thread class right-hand 0.375" thread length 1.250" overall length 32 thread quantity per inch passivate surface treated round, open unc thread series
2a thread class right-hand 1.000" thread length 2.000" overall length 32 thread quantity per inch navy special project cadmium surface treated unf thread series
3a thread class right-hand 0.745" thread length 3.996" overall length 20 thread quantity per inch cadmium or zinc surface treated round, closed unjf thread series