include module nut_tolerance_test() { steps = 3; step_width = 0.1; for(i = [-steps : steps]) { tol = nut_d_tol + i * step_width; translate([i*5*nut_d,0,0]) difference() { cube([5*nut_d, 5*nut_d, 2*nut_h]); translate([2.5*nut_d,2.5*nut_d,0]) { union() { cylinder(d=nut_d,h=2*nut_h,$fn=50); translate([0,0,nut_h]) cylinder(d=nut_d_tol+nut_d,h=nut_h,$fn=50); } } } } } nut_tolerance_test();