Nautilus corkscrew compression cam lever for casement window air conditioner mounting (or anything really)

This uses 3 standard-sized pan-head (pocket) screws, one for the lever/arm fulcrum, and 2 more for mounting the brace/block.

The ‘open’ area between the 4mm (thin) side of the corkscrew and the handle is to allow the mounted object to fit past the mounting blocks. e.g. when I want to remove this board from the casement window, I just throw all the levers up, and it pulls right past the mounting blocks (which stay installed for next year).

I suggest installing the levers/arms onto your piece to be mounted, and then installing the blocks when the cam/arm is set to the ‘thinnest’ part of the screw thread. You should also make sure the thing you are mounting is snug to the wall so the blocks get installed at a good depth vs. the cam/arm. After install, just pull the lever(s) until the mounted piece is firmly secured.

For this use-case, I have a thin layer of compressible weather stripping between the board, and the edge of the casement window screen, which the cams help to compress into place.

You could probably use this for any mounting/compression task, but it was made for mounting my air conditioner.

Mirror both parts for the right side.