M3 bolt & nut calibration - estimate printer's XY expansion

thingiverse

Mostly, the models printed by users show slight discrepancies. The most problematic scenario occurs when individual parts of a model won't assemble properly, or when a nut fails to screw into place. In many cases, the provided nut is too large for its intended slot in the printed model. To rectify this issue, some people have found it helpful to shave off a small amount of material from the excess. However, there are situations where such adjustments aren't feasible. Since M3 bolts and nuts are among the most frequently used types, I created a calibration tool that can estimate your printer's XY expansion. This model also allows users to determine how much additional space is needed to achieve either a snug or loose fit.