Contact Tip Compatible with Brand Tweco Series 15HFC Compatible with Model Tweco 500 Compatible with Series Tweco 500 Tip Shape Cylindrical Duty Rating Heavy Duty Maximum Wire Diameter 0.078125 in For Wire Type Flux-Cored Solid Maximum Current 500 A Connection Type Threaded For Nozzle Series 25CT For Gas Diffuser Number 55 55H 55SW Welding Processes MIG Welding (GMAW) Connection Thread Size 5/16 In.-24 Inside Diameter 0.093 in Outside Diameter 0.355 in Overall Length 1.625 in