2a thread class right-hand 0.375" thread length flat countersunk head style 32 thread quantity per inch cadmium screw surface treated unc thread series
3a thread class right-hand 0.450" thread length thumb no. 1 head style 32 thread quantity per inch 3rd shoulder 0.148 in. dia by 0.029 in. lg, 4th shoulder 0.188 in. dia by 0.031 in. lg unc thread series
2a thread class right-hand 0.446" thread length flat countersunk head style 24 thread quantity per inch cadmium screw surface treated slot in thd end, 0.070 in. deep, 0.080 in. w unf thread series
3a thread class right-hand 0.250" thread length headless (setscrew) head style 40 thread quantity per inch cadmium or chromate zinc surface treated unc thread series