Nut and Bolt Cutouts M2 + M3 (OpenSCAD Library)

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Please see the GitHub repository. Nut and Bolt Cutouts This library delivers printable profiles of nuts and bolts. Currently, it contains M2 and M3 profiles. The tolerance and part constants are based on empirical measurements from a digital caliper using machine head metric nuts/screws/bolts and from prints on my QIDI printer with various ABS filaments. A calibration object for tuning this to your hardware is included as MetricCalibrationPlate.scad. In my case, I have found that a tolerance of 0.1 millimeters results in tight fitting parts that aren't difficult to insert, and 0.2 millimeters results in loose fitting parts. Usage The intended usage is to use this library for difference cutouts: use $fs = 0.5; $fa = 2; w = 10; h = 10; difference() { translate([-w/2, -w/2, -h]) cube([w, w, h]); BoltM3(l=15); } Inset By default, all parts have their origin extending in the negative Z direction with the head of the part at [0, 0, 0]. You can place the head above the X-Y plane by specifying the optional parameter inset=0 use $fs = 0.5; $fa = 2; w = 10; h = 10; difference() { translate([-w/2, -w/2, -h]) cube([w, w, h]); BoltM3(l=15, inset=0); } Parts use use $fs = 0.5; $fa = 2; BoltM3(); translate([0, -10, 0]) NutM3(); translate([10, 0, 0]) BoltM2(); translate([10, -10, 0]) NutM2(); Inset No Inset