M3 Tolerance Tool

Little tool to test tolerances for M3 bolts and general part fit.

Print at the same settings you will be using for your part, and test bolt shafts, heads, screw thread inserts and general fit against the tool to choose the tolerances that will work for your project. It includes a 10x10x2mm test block for checking square fit and dimensional accuracy.

F3D file included to customise it for your needs. Dimensions as exported in the attached sketch.