Tweco® Coarse Threaded Brass Nozzle with 1/2" bore size is perfect for standard gas diffuser. 3.183" Nozzle with 0.875" OD making it ideal for use in light to medium duty welding application up to 250 A. It features part number rolled stamped on the external surface for easy identification. Nozzle with recess contact tip relationship 0.125 - 0.156" is made from copper alloy. It has a 3-piece design without an additional insulator includes a nozzle housing, which is cut and formed from 122 DHP copper alloys tubing, a nozzle insert machined from a solid brass and nozzle insulator constructed from silicone material. It features threads on the standard EL gas diffuser. It has nozzle insert that crimped in place to let the nozzle to slide over a metal spring that is a part of the gas diffuser. Nozzle offers electrical insulation required from the gas diffuser using the nozzle insulator. Nozzle is sold as 2 per pack.