This is an adapter to mount a M.2 Ethernet Adapter Jack into the cutout provided in micro form factor desktops such as the Lenovo M700. It has only been tested on the M700 but the dimensions are based on the standard DB-9 jack, so it should fit all cutouts.

The part requires 2x M3x6mm thermal inserts, the bore size is 4mm to suit. This is intended to be mounted with M3x6 fasteners from the inside of the case, which can be fiddly but is possible.

This is based around the particular RTL8125B A+E Key Adapter that I received from a well known global online retailer, but I expect many of the breakout connectors are identical. Having said this, no warranty it will fit any other on the planet. STEP files are provided to modify if required.

I printed mine in PLA-CF as I had some spare, the included profile is for Matte PLA.