Not a tap exactly but something similar. I wish to thread an existing hole with 1/2" NPT. The hole is already the proper size it just needs threads. Here is the easy part, both pieces are plastic. The hole is actually the pouring spout in the lid of a Specter MWC, it's pretty rigid but I think will cut easily. I want to thread in a short section of grey PVC that is threaded in each end to make a spout for a nozzle off the lid. It wouldn't be used all the time and I want the lid to seal like factory and I figure this is the least damaging.
I bought a 3" black pipe section with the male threads and was wondering if I can modify it to cut the threads. I was thinking about cutting (grinding) a couple of flutes and then threading it in with some pressure in hopes the modded pipe will cut thread and the flutes remove the cuttings.
What do you all think? Will it work or is there another way I should go about this?