"Toyota Screw Grommet # 10 Screw Size"
thingiverse
Seeking a plastic grommet, also known as a nut, for my 1987 Toyota 4Runner? These small parts secure machine screws in sheet metal holes, such as the side marker light on your 4Runner. Each grommet has a 10mm square base and a 3.5mm diameter screw hole. Find replacements at https://www.shapeways.com/model/1834583/toyota-plastic-screw-grommet-12-pieces.html, or create your own using Solidworks and a digital caliper.
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