3a thread class right-hand 0.625" thread length flat chamfer head style 0.055" hole diameter 28 thread quantity per inch cadmium surface treated unf thread series
2a thread class right-hand 0.125" thread length headless (setscrew) head style 32 thread quantity per inch chromate zinc surface treated unc thread series
2a thread class right-hand 0.250" thread length hexagon head style 32 thread quantity per inch undercut at base of shoulder 1/16 in. w, by 0.020 in. deep chromate zinc surface treated unc thread series
3a thread class right-hand 0.532" thread length hexagon head style 2.953" grip length 28 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 0.045" grip length anodize body or oxide film body surface treated
2a thread class right-hand 0.562" thread length fillister head style 32 thread quantity per inch zinc or phosphate or enamel screw surface treated gray enamel unc thread series
3a thread class right-hand 0.224" thread length flat chamfer head style 56 thread quantity per inch passivate screw surface treated thd relieved groove, 0.031 in. wide by 0.067 in. min, 0.072 in. max dia; head offset from centerline of longitudinal axis 0.013 in. min, 0.015 in. max unf thread series
3a thread class right-hand 0.224" thread length flat chamfer head style 56 thread quantity per inch passivate screw surface treated thd relief groove 0.031 in. wide by 0.067 in. min to 0.072 in. max dia unf thread series
Used on an/ale-38. 3a thread class right-hand 1.350" thread length 3.880" overall length 20 thread quantity per inch cadmium surface treated unf thread series
3a thread class right-hand 0.440" thread length hexagon head style 24 thread quantity per inch undercut to 0.280 in. dia cadmium surface treated unf thread series
3a thread class right-hand 0.282" thread length hexagon head style 0.078" hole diameter 24 thread quantity per inch dry film lubricant unf thread series
