The LMI truss rod nut is 3/4” length x 1/4” OD with a 10-32 thread. Supplied with all our truss rods (along with a special long shanked 9/64” Allen wrench), they’re designed to keep headstock cutaway to a minimum. These are available for people who make their own truss rods.
After several requests, we’ve made available a Fender™-style nut with the same 10-32 thread as our LMI nut. OD is 3/8” and length is 1/2”.