4-40 Standoffs

Plastic standoffs are oddly expensive so I made my own. The hole is worked out to be just the right size to get a solid thread with minimal force using a 4-40 tap drill ($5-10 at any hardware store). Using a tap drill is highly recommended for a solid fit. In a pinch you can screw in 4-40 machine screws with a screwdriver and some force.

Thread on both sides to use as separators between boards.
Takes about half a gram of PLA for 1" standoff and 1-2 minutes per standoff. Good use for the last