The new Tapper+ Xtreme concrete screw is fully threaded in lengths up to 3-1/4" for light gauge metal attachment to CMU. It is easily installed 2-1/2" - added strength with low torque, and installation drive mechanisms, -5/16" hex head and #3 Phillips. Choice of head styles: hex flange head, trim hex head, flat and trim flat. Tested to meet ICC-ES Standards for uncracked concrete

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