M3 Thumbscrew Adapter - No Support Needed

Designed for my Airplane Phone Mount, these screw adapters are strong and hold the nut and screws very tight. I can't guarentee that these will work for every screw and nut combination. Personally, I used this kit from Amazon.

Press-fit the nut into the nut-side, and screw in from the opposite side. I added sequential bridging to the nut side so it doesn't require any additional support.