I'm looking to (drill and) tap some 304 1/8 hard stainless tubing at 3/8-24 UNJF about 1" deep. Is it a good idea to try this in a lathe? I see a few taps listed at MSC but none long enough to get to full depth. I may need a custom tap. Annealed 304 sounds bad enough. How much worse will 1/8 hard be? Is there a better way?