3a thread class right-hand 1.500" thread length flat chamfer head style 0.061" hole diameter 20 thread quantity per inch cadmium surface treated unrf thread series
3a thread class right-hand 0.775" thread length pan head style 32 thread quantity per inch two slots on screw 0.044 in. min, 0.054 in. max w; 0.982 in. max lg passivate surface treated unc thread series
3a thread class right-hand 0.371" thread length flat countersunk head style 0.678" grip length 28 thread quantity per inch cadmium surface treated unjf thread series
Used on joint stars target radar sys. 3a thread class right-hand 0.469" thread length flat countersunk head style 0.615" grip length 24 thread quantity per inch cadmium surface treated unjf thread series