Slotted Screwtop Passthru
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A bulkhead or panel passthru wth a slot to allow the cap to be screwed on with a cable present.
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Model information
- Source
- Printables
- Category
- Electronics
- License
- Creative Commons — Attribution — Noncommercial — Share Alike
A passthrough for a case, panel, or bulkhead with a screw cap and is slotted so the cap can provide a degree of weather protection while a cable is in place. The body has a 27mm ID. The model uses a nominal M33x2 thread. The model includes a body, screw cap, hex nut, and star nut.
As of 12/28/2025, I updated the model to include two versions, short and long. The short version has a roughly 8x8mm opening with 2 threads engaged in the cap. The long version has a roughly 8x12mm opening with 2 threads engaged in the cap.
Pictures show a 12awg pair & Starlink Mini power cable exiting through the long version passthrough. The cap engages multiple threads when installed with the cables in place.
I also added provison for use of a length of 3.2mm beaded chain for cap retension. This provision includes addition of new cap versions with a recess for chain end and a retainer component to be glued or taped to the container wall. Use the recess with a bit of glue should secure the bead chain end to the component.
A 0.2 (or smaller) layer height is recommended for thread quality.
Fusion 360 source and .STEP files are included as well as the .STL files.