Trying to do a very simple job. I have threaded a length of brass tubing with an HSS 1/4 x 40tpi die. I have two bags of nuts one from supplier A and one form supplier B. Nuts "A" perfect. Nuts "B" far too tight to be of sensible use. I made a half nut "C" from some brass hexagon, using a 1/4 x 40 tpi HSS tap. Nut is far too tight. Tightened up the die and re-ran it through again, still too tight. Ran the tap through again, still too tight. Tightened the die as far as I can without something breaking and Nuts "B" and "C" still tight and nuts "A" are getting a bit on the slack side.
Of all the pieces in this puzzle I can't work out what to chuck in the bin. Maybe me? The only good news is that I haven't scrapped the part!