A tight fit female MMCX connector, typical for headphones with detachable cables.

It has two flanges to keep it from being pushed in or pulled out with the wire, the also serve as additional material if you decide to fix the part by melting it (with a soldering iron for example).

Above is a connector with a cable attached to DIY open-back headphones.

The material is PETG at nozzle temp. 230C° table temp. 85C°.

When printing in pairs, make sure to set printing sequence to “by object” (instead of “by layer”).