test_nut_hole.scad

// download Nut_job.scad from https://www.thingiverse.com/thing:193647
use <Nut_job.scad>

module for_nut_hole(hg, sth, clf, cod, crs) {
    intersection() {
        union() {
            hex_countersink_ends(sth/2,cod,clf,crs,hg);
            screw_thread(cod,sth,clf,hg,crs,-2);
        }
        translate([-cod / 2, -cod / 2])
            cube([cod, cod, hg]);
    }
}

module example() {
    //Height of the nut
    nut_height = 6;
    //Outer diameter of the bolt thread to match (usually set about 1mm larger than bolt diameter to allow easy fit - adjust to personal preferences) 
    nut_thread_outer_diameter = 9;
    //Thread step or Pitch (2mm works well for most applications ref. ISO262: M3=0.5,M4=0.7,M5=0.8,M6=1,M8=1.25,M10=1.5)
    nut_thread_step = 2;
    //Step shape degrees (45 degrees is optimised for most printers ref. ISO262: 30 degrees)
    nut_step_shape_degrees = 45;
    //Resolution (lower values for higher resolution, but may slow rendering)
    resolution = 0.5;
    nut_resolution = resolution;

    difference() {
        // ネジ穴を開けたい 3D オブジェクト
        cube([10, 10, 10]);

        // ネジ穴
        translate([5, 5, 10 - nut_height])
            for_nut_hole(nut_height, nut_thread_step, nut_step_shape_degrees,
                nut_thread_outer_diameter, nut_resolution);
    }
}

example();