The product linked below may better meet your needs:
https://eur.vevor.com/propane-gas-forge-c_11133/vevor-portable-propane-forge-3-burner-farrier-forge-2600-knife-metal-square-p_010603747051
This product is equipped with a W21.8×1/14'' LH regulator thread. If this screw fits, we recommend purchasing the above product.
By vevor