One Hole AC/MC Strap 14/2 12/2, Zinc Plated Steel
https://dev.nsiindustries.com/product/one-hole-ac-mc-strap-14-2-12-2-zinc-plated-steel/
Bridgeport One Hole AC/MC Straps are used for securing AC/MC cable or flexible metal conduit to a variety of mounting surfaces. Made from zinc plated steel, these straps are dependable and resistant to corrosion.