Tolerances

at 0.4 nozzle

• Screw hole diameter

8.0mm might be forced with hammer
8.2mm (+.2mm) allows for constrained movement of screw in the part
0.3mm (+.3mm) allows for free movement of screw in the part

• Hex slots: diameter of circumscribed hexagon - cut away from the body

12.8mm might be forced with hammer
13.0mm (+.2mm) experiences minimal friction at first layer, enough to hold the hex nut in place
13.1mm (+.3mm) allows for free movement of hex nut in the part

• Typical

0.05mm tolerance for snug fit.