This protective cap can effectively protect your BNC connector when it's not in use.

Tighten the protective cap onto the BNC connector and screw it firmly. Its fixing method relies on conical friction, not a spring-loaded clip

It is recommended to print with a relatively thin layer height

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Updated on January 5, 2026:
To improve the friction effect, I slightly reduced the inclination angle of the internal grooves.

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As always, I have attached the OpenSCAD source file for your convenience, so you can customize and optimize it as needed:

• Fromhttps://www.openscad.orgDownload and install OpenSCAD.
• Launch OpenSCAD and open the attached OpenSCAD source file
• You can adjust the various parameters at the top of the file and even modify the code directly.
• Save the changes
• Render the design model
• Export the rendered model to formats such as .stl file
• Carry out the slicing process and start printing.

For more of my design works, please visit:
https://www.thingiverse.com/thinger13/designs