3a thread class right-hand 0.187" thread length flat countersunk head style 40 thread quantity per inch cadmium screw surface treated unjc thread series
flush (flat) countersunk (included angle - less than 135 deg w or w/o chamfer) head style 0.313" grip length anodize stem or chromate stem surface treated
3a thread class right-hand 0.541" thread length double hexagon head style 1.500" grip length 20 thread quantity per inch navy special project passivate surface treated unjf thread series
2a thread class right-hand 1.000" thread length hexagon extended washer head style 16 thread quantity per inch cadmium surface treated unc thread series
3a thread class right-hand 0.453" thread length flat countersunk head style 1.678" grip length 20 thread quantity per inch cadmium surface treated unjf thread series
3a thread class right-hand 0.453" thread length flat countersunk head style 1.615" grip length 20 thread quantity per inch cadmium surface treated unjf thread series
3a thread class right-hand 0.453" thread length flat countersunk head style 1.302" grip length 20 thread quantity per inch cadmium surface treated unjf thread series
3a thread class right-hand 0.453" thread length flat countersunk head style 1.428" grip length 20 thread quantity per inch cadmium surface treated unjf thread series
3a thread class right-hand 0.453" thread length flat countersunk head style 1.552" grip length 20 thread quantity per inch cadmium surface treated unjf thread series