The same quality material and strength of the square, aluminum support plate, just a little easy to install-no indexing.

  • The round aluminum supports plates are available in 5/16" x 1-3/8" thread in quantities of 24...

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    Product Review

    The same quality material and strength of the square, aluminum support plate, just a little easy to install-no indexing.

  • The round aluminum supports plates are available in 5/16" x 1-3/8" thread in quantities of 24, 96, 144 and 1,008


    • The largest diameter round aluminum backing plate on the market
    • 1 3/8in. diameter plate works with 5/16in. studs

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