This is the Ultimate Hole-Test pattern

(for M3, M4, M5 and M6 screws)

Now you can print these test files and try your screws (threads + loose insert) and write down the sizes that fits the best for your printer/nozzle/filament/settings to use the values as input for your next designs and safe time on too little holes and rework time or reprint with different sizes.

The Hole-Test contains horizontal holes (from the flat print-surface) and vertical holes on the side wall.

Each Hole-Test got patterns for thread-in sizes (3x horizontal + 3x vertical) and the rest as loose fit test.

Hint: Try to match the horizontal and vertical sizes to one number that fits for you and write them down where you can see it next time you design something.

You can also find a sketch of my vertical hole design that works best for me (there are several different styles out that might work)

Check out the pictures and if you like my design, please give me some feedback and hit the like button :)