I have a long length of CDS tube that measures up at 20mm OD and 11.75 ID
Will that take a ½” UNF thread OK or do I need something else?
If I need to buy something, what would you recommend?
Pretty sure 1/2 needs to be 11.5 bore for good tapping. 5/8 into that tube will leave a little on the wall, although imho that's too small a tube.
Also, the tube McGills sell is too thin. I believe it's 1.5mm wall erw?? May work on a stock car for an evenings racing but too wimpy for street use, again....imho.
What sort of bushes will you be using or are you going for rose joints?