Slim Light Bar Mount for GM Vehicles

thingiverse

This was designed as a slim light bar mount. Will fit various GM factory roof racks between 07-14. Bottom keyed part uses a 4mm locknut and cap head screw. When installing, the 4mm screw is inserted into the mount and threaded into the locknut in the base. Once the key has been inserted into the rack, the screw is tightened which turns the key and tightens up to the rail which locks the whole thing in place. Tighten until it doesn't move, over tightening will crack the mount. I've been using this for over 6 months and have had no issues. It will print fine in PETG or similar Higher temp material is best.