I split this into 3 parts:

The clamp itself, a nut and a bolt.

I recommend printing the nut and bolt at lower layer heights for cleaner overhangs and a better fit. I used 0,12mm. I also scaled down the bolt to 99% in x and y In the slicer. Do not change z scale, as this affects the pitch and wouldn’t fit into the nut anymore.

The clamp is designed to be printed on its side, the cable canal facing downwards. no supports are needed, holes are teardrop shaped, which works pretty good. I used PETG, 3 perimeters and 15% cubic infill.

I designed the hole for the apple charger with a clearance of 0,2mm in diameter. If you need changes to this, im happy to do so. For

Maximum table thickness is ~44mm. I can provide a longer bolt in the future for really thin tables.

I'm happy to implement changes, if you have any requests.

EDIT 29.06.2023:

-added Bolt versions _45mm and _55mm, which make the original clamp work with thinner tables (min. 0mm for the 55mm version)

-added clamp version for thinner tables (clamp opening 30mm vs. original 45mm)