[cart213]

The diameter is 7mm, and the endplate is 1mm thick. If you are going to make some plastic plugs, I'd be interested in buying some from you. I don't need them for a motor brace, but I just want to keep dirt out of the motor. Otherwise, I'll just use electrical tape to cover the holes up. I don't think I need a brace, because I got a 1512, so it's shorter.