I have another advanced version of this that has various sizes (30, 32, 35, and 40 to ensure your adapter will fit). https://www.printables.com/model/886799-rj45-ethernet-cable-rj45-keystone-mount
I could not find something to protect the end of my carefully installed shielded 50 foot cable snaking through my house to my computer so made this rj45 jack mount. This a raised floor mounted rj45 keystone jack for Ethernet cables. You also could use this with a desk to have a mounted Ethernet jack on top of your desk.
You need a female to female rj45 inline coupler keystone jack. The jacks I used from amazon were AMPCOM CAT6 RJ45 Inline Coupler Keystone Jack, Shielded Female to Female that are 30mm in length.
The floor in the hole is 19mm diameter hole in my wood floor and I have my Ethernet cable coming through. I made the print, then inserted the keystone jack into it, attached the existing cable, and screwed it to the floor.
The dual rj45 adapter sits entirely inside this mount and is entirely above the mounting surface as you can see from the pics.
The author marked this model as their own original creation. Imported from Thingiverse.