When you only want to stand a short distance off the wall, try this aluminum spacer.

At only 3/16" tall, you will get the depth you are looking for with minimum distance off the mounting surface.

The spacer is drilled through at 5/16", and has no internal threading.  Best for use with wood hanger screw or other hardware to extend the anchor through the spacer and material to the cap.

The EZ-SP1 comes in clear anodized aluminum only.