Snap connector

thingiverse

If you need to make a strong, lasting connection between two separate prints with flat surfaces that fit together perfectly, consider using a snap connector. I use it to connect an auxiliary breakout box to a Pi case, but its usefulness extends beyond this specific application - it's a versatile way to join prints with relatively thin walls. For more substantial connections, I prefer to use sturdy pegs. Since the value of this design lies in its integration into a larger project, I've included the 123dx file.