Used on 15 ton vapor. 3a thread class right-hand 0.3125" thread length pan no. 2 head style 40 thread quantity per inch cadmium screw surface treated unjc thread series
3a thread class right-hand 0.452" thread length hexagon head style 32 thread quantity per inch cadmium screw surface treated hydrogen embrittlement baking unjc thread series
3a thread class right-hand 0.515" thread length hexagon head style 32 thread quantity per inch cadmium screw surface treated hydrogen embrittlement baking unjc thread series
