$fn=60;

include <BOSL2/std.scad>
include <boltsos_0.4.1/BOLTS.scad>

module m4_screw() {
    rotate([0,180,90]) {
        DIN931("M4");
        translate([0,0,-1.3]) DIN931("M4");
    }
}
    
rotate([0,180,0]) difference() {
    ycyl(l=140, d=9, rounding=2);
    * cuboid([9,130,9], rounding=3);
    translate([0,50,-1.5]) rotate([0,180,90]) m4_screw();
    translate([0,-50,-1.5]) rotate([0,180,90]) m4_screw();
}