3a thread class right-hand 0.745" thread length hexagon head style 1.485" grip length 20 thread quantity per inch passivate surface treated unf thread series
3a thread class right-hand 0.425" thread length dished hexagon head style 1.500" grip length 24 thread quantity per inch cadmium surface treated unf thread series
2a thread class right-hand 0.121" thread length fillister head style 48 thread quantity per inch nickel screw surface treated under-side of fillister type screw head undercut, 0.161 to 0.184 in. dia, 0.007 to 0.012 in. depth unf thread series
flush (flat) countersunk (included angle - less than 135 deg w or w/o chamfer) head style 0.126" grip length 1565 single pounds per square inch shear strength cadmium sleeve surface treated