Can I use a full size nut as a leveling nut?
In most situations you can. A leveling nut is a term that refers to the application of the nut rather than the physical dimensions of the nut. Many times they are called out as “jam” or “half” nuts because they can be cheaper, do not need to provide structural value, and are just used for leveling purposes. These nuts are not typically off the shelf domestically though. If you have enough room to allow for the full size nut, it will not affect the integrity of the assembly. Especially jobs with domestic requirements a full size leveling nut can be a much more cost effective and expedient option.