Sioux Chief 523-3MS series mini strut clamps can be used where necessary to secure tube/pipe in residential or commercial applications. Clamps feature a zinc-plated finish for corrosion resistance, and include a thread formed on one side designed to receive a screw or bolt to eliminate the need for a hex nut.. Clamps shall be installed in accordance with national codes for hanger spacing requirements. Clamps must be used with Sioux Chief 523 Series PowerBar mini strut bracket. Load ratings indicated are determined by maximum load rating of bracket. Clamps shall be IAPMO listed.