3a thread class right-hand 0.500" thread length flat chamfer head style 0.047" hole diameter 28 thread quantity per inch passivate surface treated unf thread series
3a thread class right-hand 0.780" thread length flat chamfer head style 0.046" hole diameter 32 thread quantity per inch cadmium surface treated unf thread series
2a thread class right-hand 1.500" thread length fillister head style 0.046" hole diameter 24 thread quantity per inch passivate screw surface treated unc thread series
flush (flat) countersunk (included angle - less than 135 deg w or w/o chamfer) head style 0.459 mils grip length 27000 single pounds per square inch shear strength
3a thread class right-hand 0.401" thread length double hexagon extended washer head style 0.079" grip length 28 thread quantity per inch unjf thread series