Sometimes you need to hang something with a very small hole onto your multiboard. These hooks are perfect for that.

They are a two part system: you thread the nut onto the hook, screw the hook into the multiboard as much as you can keeping it oriented upwards, then “unscrew” the nut against the board so it creates a strong connection (similar to when you tighten 2 nuts). The pictures will clarify this explanation.

They are 25mm long, and they come in two profiles: thin/small and regular. The thin profile is 3mm, and the thick one is 5mm.

Based on my calculations, they are fairly strong. If they are printed with PLA at 100% infill (recommended) and flat on the bed (as they should be printed) the simple thin hook (horizontal, 25mm long) should be able to hold 3-4 kgs, while, the regular one will hold without problem 10kg. 

I suspect that before the hook breaks, they would have flexed a lot, and is likely the thread might give up first, so be careful.

How to print

• print flat, no supports need
• print one nut per hook
• print with 100% infill for maximum strength, but even at lower fill will 3 walls, they will be sufficiently strong for most “usual” applications.

The threads in these hooks have been reversed-engineered to be compatible with multiboard.

Other hooks

If you need a stronger or longer hook, check these: [https://makerworld.com/en/models/868514](https://makerworld.com/en/models/868514)