2a thread class right-hand 0.066" thread length flat countersunk head style 32 thread quantity per inch enamel lusterless screw surface treated head color no.36231 fed std 595 unc thread series
2a thread class right-hand 0.325" thread length pan head style 40 thread quantity per inch enamel screw surface treated head color gray 36231 fed-std-595 unc thread series
2a thread class right-hand 0.450" thread length pan head style 40 thread quantity per inch enamel screw surface treated head color gray 36231 fed-std-595 unc thread series