OD threads start with the nominal size, in your case 2.75" less some clearance. This would be your major diameter. The book says 2.7481 to 2.7367. Now you need to know how deep to cut the threads. This is the pitch diameter. Your range is 2.694 to 2.6878. If I were doing this I'd start with 2.745 od, and cut the threads about .025 deep. This will give you a minor diameter of 2.695.
Now for the nut. I'd bore it to 2.697 (this gives .002 clearance to the minor diameter of the bolt) an cut the threads .0265 deep (this takes it out to 2.75, giving you .005 clearance on the od of the bolt).
This is how I would do it, but by no means is it gospel.
On all equipment there are 2 levers...
Lever "A", and Lever F'in "B"