One Hole Rigid Pipe Strap 1/2″, Zinc Plated Steel
https://nsiindustries.com/product/one-hole-rigid-pipe-strap-1-2-zinc-plated-steel/
Bridgeport One Hole Rigid Pipe Straps are used to secure rigid conduit and intermediate metal conduit to a variety of mounting surfaces. Zinc Plated Steel construction offers a tough, corrosion resistant mounting solution in harsh environments.