Used on com stores do. 2a thread class right-hand 0.500" thread length flat countersunk undercut head style 24 thread quantity per inch unc thread series
Used on com stores do. 2a thread class right-hand 0.500" thread length pan no. 2 head style 32 thread quantity per inch passivate screw surface treated unc thread series
3a thread class right-hand 0.3695" thread length flat countersunk head style 32 thread quantity per inch plastic screw surface treated unjc thread series