Completed design for v2.

models/common/metric_nut.scad

@@ -0,0 +1,20 @@
+// include <../../config.scad>;
+use <./beam_hexagonal.scad>;
+use <./metric_bolt_functions.scad>;
+
+module metric_nut(size, centre = true) {
+    height = get_metric_bolt_head_height(size);
+    diameter = get_metric_bolt_head_diameter(size);
+    radius = diameter / 2;
+    color("gray") difference() {
+        // body
+        beam_hexagonal(height, diameter, centre = centre, suppress_shopping_outputs = true);
+        // hole
+        cylinder(height, size / 2, size / 2, center = centre);
+    }
+    // Shopping
+    echo(str("Nut: Nut M", size, " - x1"));
+}
+
+// $fn = 200;
+metric_nut(12);