// https://en.wikipedia.org/wiki/ISO_metric_screw_thread
// M6
-thread_nom = 6;
-thread_pitch = 1.00;
-thread_act = thread_nom - 0.300;
+thread_nom = 4;
+thread_pitch = 0.70;
+thread_act = thread_nom + 0.375;
head_size = 10;
thread_len = 12.5;
base_th = 1.5;
base_sz = [40, head_size];
-$test = true;
+$test = false;
// calculated