Not sure where to post this but maybe someone here can help. I am writing a program and the part has 1/4-18-NPT pipe threads. I want to do the threads in the machine. What I need to know is what is the max and min for the hole size. The depth of the hole is .625. I think the bottom (minimum) of the hole is going to be .440 but what is the top of the hole suppose to be? .460?
.455? I want to use the top of the hole diameter i.e. .46 and taper down to the .440. Anyone know what the top of the hole and the bottom of the hole should measure for 1/4-18 pipe threads?
Thanks!!