Twist lock fastener
thingiverse
A$6 to purchase from the dealer each, which sounds outrageous - so, made them myself instead. Instructions: Printed with high-resolution at 0.1mm using 100% fill and just one shell layer. Designed the circular head as a semi-circle to twist lock faster when printed lying flat on its completely even side. Requires this positioning to run the printed strands lengthwise for maximum strength - if printed vertically, it would almost definitely break under pressure across one of the printed layers. If needed, use a hacksaw blade to clean each flute slightly and improve its grip. Used this for the cover panel below the dashboard near the steering column and pedals on a BMW.
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