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Two of these threaded mounting tabs are used to attach the ST350 to bridges, buildings, cranes, and other civil structures. The 21278 mounting tabs fit into the 21279 Tab Jig when attaching the ST350 to steel, pre-stressed concrete, or wood. Attachment to reinforced concrete typically requires two 21278 threaded mounting tabs, a 21280 transducer extension, and a 21282 extension jig.
The 21278 provides a single tab. Two tabs are required. Ensure that your order or quote includes a quantity of two.