3a thread class right-hand 0.184" thread length flat chamfer head style 56 thread quantity per inch color black oxide surface treated unc thread series
3a thread class right-hand 0.434" thread length flat chamfer head style 56 thread quantity per inch finish color black oxide surface treated unc thread series
3a thread class right-hand 0.400" thread length dished hexagon head style 0.178" grip length 28 thread quantity per inch cadmium surface treated unjf thread series
3a thread class right-hand 0.400" thread length dished hexagon head style 4.615" grip length 28 thread quantity per inch cadmium surface treated unjf thread series
3a thread class right-hand 0.445" thread length dished hexagon head style 1.240" grip length 24 thread quantity per inch passivate surface treated unjf thread series
3a thread class right-hand 0.489" thread length flat countersunk head style 1.928" grip length 20 thread quantity per inch cadmium surface treated unf thread series
flush (flat) countersunk (included angle - less than 135 deg w or w/o chamfer) head style 0.251" grip length anodize stem or chromate stem surface treated
2a thread class right-hand 1.250" thread length hexagon head style 0.690" grip length 13 thread quantity per inch cadmium or zinc surface treated unc thread series