3a thread class right-hand 0.484" thread length flat chamfer head style 0.029" hole diameter 32 thread quantity per inch cadmium surface treated unc thread series
3a thread class right-hand 0.276" thread length flat countersunk head style 32 thread quantity per inch cadmium screw surface treated unf thread series
Used on propeller systems. 2a thread class right-hand 0.230" thread length flat fillister head style 28 thread quantity per inch screw, special head; critical dimensions unf thread series
2a thread class right-hand 0.610" thread length square head style 0.116" hole diameter 32 thread quantity per inch cadmium or cadmium surface treated unf thread series
2a thread class right-hand 0.484" thread length fillister head style 32 thread quantity per inch passivate screw surface treated undercut 0.105 in. deep by 0.031 in. w 0.485 in. from bearing surface of head unc thread series