flush (flat) countersunk (included angle - less than 135 deg w or w/o chamfer) head style 0.126" grip length 1845 single pounds per square inch shear strength
3a thread class right-hand 0.317" grip length 24 thread quantity per inch 125000 single pounds per square inch shear strength cadmium surface treated unjf thread series
3a thread class right-hand flush countersunk head style 0.317" grip length 32 thread quantity per inch 95000 single pounds per square inch shear strength cadmium surface treated unjf thread series
Used on aircraft, f-16. 3a thread class right-hand 0.413" thread length spline drive shear head head style 0.490" grip length 24 thread quantity per inch cadmium threads surface treated unjf thread series
2a thread class right-hand 0.216" thread length flat countersunk head style 36 thread quantity per inch passivate screw surface treated unf thread series
3a thread class right-hand 0.703" thread length hexagon head style 0.079" grip length 28 thread quantity per inch cadmium surface treated unjf thread series