57N78 - Weldcraft 57N78 #10 Metal TIG Nozzle (5/8 Inch)

Weldcraft 57N78 Metal Nozzle #10 (5/8")

The Weldcraft 57N78 Metal Nozzle is a specialized consumable designed for precision TIG welding applications using WP-9, WP-9V, and WP-9P series torches. As a critical component of the torch's front end, this nozzle directs the flow of shielding gas over the weld pool, protecting the molten metal from atmospheric contamination. The #10 size indicates an orifice diameter of 5/8 inch (approximately 16mm), which provides a broad umbrella of gas coverage. This is particularly beneficial when welding reactive metals or when sticking the tungsten out further is necessary for visibility or access.

Unlike standard alumina ceramic cups, this specific listing specifies a metal construction, offering unique durability characteristics for specific industrial environments. The nozzle threads securely onto the collet body or gas lens of the torch, ensuring a tight seal that prevents gas turbulence and aspiration of air. Proper gas coverage is essential for achieving clean, porosity-free welds, and the 57N78 is engineered to deliver a laminar flow pattern that stabilizes the arc.

Weldcraft, a brand synonymous with quality in the TIG welding industry (now under Miller Electric), manufactures these nozzles to tight tolerances. This ensures consistent fitment across compatible torch bodies, including the popular 9-series air-cooled torches and potentially 20-series water-cooled torches that share similar front-end threading. Whether you are performing maintenance, repair, or fabrication, using genuine Weldcraft parts helps maintain the performance and longevity of your welding equipment.

This product is sold as a single unit. It is an essential addition to any TIG welder's consumable kit, allowing for quick changeovers when different gas coverage profiles are required. The 5/8" opening is significantly larger than standard #6 or #7 cups, making it a go-to choice for walking the cup on larger pipe or when welding materials that require extra shielding gas protection.