3a thread class right-hand 0.140" thread length headless (setscrew) head style 32 thread quantity per inch treated w/passivated process no. 25.01 in. accordance w/mil spec no. mil-p-12011 unf thread series
3a thread class right-hand 0.438" thread length flat countersunk head style 32 thread quantity per inch navy special project cadmium surface treated unc thread series
3a thread class right-hand 1.250" thread length headless (setscrew) head style 28 thread quantity per inch cadmium or zinc surface treated unf thread series