3a thread class right-hand 0.734" thread length hexagon head style 3.672" grip length 20 thread quantity per inch passivate surface treated unf thread series
2a thread class right-hand 0.391" thread length pan head style 32 thread quantity per inch furn w/ nut, extended washer, hexagon passivate fastener surface treated unc thread series
2a thread class right-hand 0.511" thread length flat countersunk head style 40 thread quantity per inch passivate screw surface treated unc thread series