316 Stainless steel plated 6mm threaded holes
https://www.allbro.com.au/itemdetails/hardware/hinges/pedestal-hinges/pedestal-hinges-(25)/316-stainless-steel-plated-6mm-threaded-holes?code=hb50s%2fs16h&type=2&access=2&id=33f8d17e-4035-43c0-bd0b-7dee8229fb87
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