Interface mounting plates are made from the best grade alloy steel/stainless steel, machined to the tightest specifications and are designed specifically to maintain the performance of the load cell in your application.The base is a flat surface, guaranteed to provide optimum support for the flexure. Use of the base, or a support surface with its equivalent flatness and stability, is required to ensure the exceptional performance of the LowProfile® Series. Note that the threaded hole in the base is on center, and a plug is permanently installed to seal dirt and moisture out of the space between the bottom hub of the flexure and the flat surface of the base.