2a thread class right-hand 0.300" thread length flat chamfer head style 40 thread quantity per inch drilled hole 0.150 in. deep; 0.062 in. min, 0.073 in. max dia passivate surface treated unc thread series
3a thread class right-hand flat countersunk head style 32 thread quantity per inch two keyways 180 deg apart passivate surface treated unc thread series