Mating a screw() and nut().

[spierepf]

I'm trying to design a simple cable gland based on a 3/8" screw and nut:

include <BOSL2/std.scad>
include <BOSL2/screws.scad>

INCH=25.4;

$fn= $preview ? 64 : 256;

screw_spec="3/8";
shank_length = 1.0/4.0 * INCH - 1;
thread_length = 1.0/4.0 * INCH + 1;
wire_count = 1;
wire_diameter = 1.0/4.0 * INCH;

left(15) difference() {
    union() {
        screw(
          screw_spec,
          "hex",
          tolerance="1A",
          l = shank_length + thread_length,
          thread_len = thread_length,
          anchor=TOP
        );
    }
    if(wire_count > 1) {
        for(theta = [0:360/wire_count:360]) { 
            rotate([0,0,theta]) left(wire_diameter/sqrt(3)) cyl(d=wire_diameter, h=100);
        }
    }
    cyl(d=wire_diameter, h=100);
}

right(15) nut(screw_spec, tolerance="1B", thickness="thin", anchor=TOP);

But when I print the result on my Bambu X1C, I'm finding the tolerances too tight and it is really difficult to get the nut and screw to mate smoothly. Are there options in the screw() and nut() modules that loosen the fit?

[adrianVmariano]

Use $slop.