2a thread class right-hand 0.339" thread length flat countersunk head style 56 thread quantity per inch passivate screw surface treated unf thread series
3a thread class right-hand 0.875" thread length flat chamfer head style 0.051" hole diameter 32 thread quantity per inch passivate surface treated unf thread series
2a thread class right-hand 1.250" thread length hexagon head style 13 thread quantity per inch navy special project cadmium or zinc surface treated unc thread series
3a thread class right-hand 0.425" thread length flat chamfer head style 0.490" grip length 28 thread quantity per inch cadmium surface treated unf thread series
3a thread class right-hand 0.875" thread length flat chamfer head style 32 thread quantity per inch passivate fastener surface treated unrf thread series