Hoosier Profiles Inc
1) The larger bolt is screwed in as far as what it can go.
If you need a shorter bolt for a skinny frame you will need to supply it.
If your Frame is skinnier than the gap simply put a washer or spacer on to make up the distance.
If you screw the bolt in deeper it will crush the bronze bushing.
2) The black thread locking collar has a locking screw that will most likely rub on your frame.
Grind a small notch in the frame so the screw does not come into contact with the frame.
This adjuster uses a 3/8-16 pitch screw, Every revolution move the shafts together exactly .0625
Having the repeatability is key to art work and to being able to consistently achieve the same results.