2a thread class right-hand 0.650" thread length round with wrench flats head style 24 thread quantity per inch navy special project passivate screw surface treated unf thread series
3a thread class right-hand 0.520" thread length hexagon head style 18 thread quantity per inch navy special project passivate surface treated unc thread series
2a thread class right-hand 0.440" thread length pan head style 32 thread quantity per inch navy special project passivate fastener surface treated unc thread series
2a thread class right-hand flat countersunk head style 40 thread quantity per inch passivate screw surface treated supplied with rubber washer unc thread series