How to pick the right size bolt or nut every time for DIY projects Using a bolt, nut and screw gauge takes the guesswork out of your project, helping you quickly identify the exact size you need.

That being said I primarily use M6 cage nuts since that's what APC gave us when we ordered hundreds of racks. Rack Solutions gives us a ton of 10-32 and 12-24 screws with each rail/shelf order so ...