Spark plug box
thingiverse
To achieve the top detail desired, I need to add a skirt/brim feature. For the nozzle, any type will do, but I used an 0.8mm model. The layer height for the thread is set at 0.12mm, while the rest of the object can be printed with any layer height (I chose 0.44mm). Two perimeter shells are enabled to provide additional strength. Infill density is set at 40% to balance weight and print time. To ensure a tight fit for the box, I recommend using a rubber gasket with an outer diameter of 27mm and a thickness of 2.5mm. I used Kompas-3D software to create the 3D model. Please see attached sources for more information.
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