Bridgeport One Hole AC/MC Straps are your solution for securing armored cable (AC), metal clad cable (MC) and flexible metal conduit to a wide variety of mounting surfaces. Straps are made from zinc plated steel for durability and corrosion resistance in tough environments. The mounting hole has a width of .21â€. 891-MC is sized for a cable range of 14/3 (.540") to 12/3 (.590"). Bridgeport products are manufactured for innovation, consistency and quality — providing you with everything you need to do your best work at a lower total cost. And we build every product with the same goal in mind: guaranteeing a fast, professional-grade, trouble-free installation that meets or exceeds code requirements. When you need a solution you can depend on, be sure to look for Bridgeport Orange.