I silver solder small squares of brass, say 3/32" thick, each end of the strap instead of the bends shown above. One is drilled and tapped a small BA size, the other a close clearance hole. This dispenses with the separate nut and the squares stay fairly well parallel.
The screw should be as short as practicable.
Edited By Clive Brown 1 on 11/11/2020 10:10:58