401-42-50 - Tregaskiss 401-42-50 Tough Lock Nozzle, 1/2" Bore, 1/8" Recess, Brass (10-Pack)

Technical Overview of the Tregaskiss 401-42-50 Tough Lock Nozzle

The Tregaskiss 401-42-50 is a standard duty, slip-on MIG welding nozzle designed specifically for the Tregaskiss Tough Lock™ consumable system. Engineered for industrial fabrication environments, this nozzle features a 1/2-inch (12.7 mm) bore diameter, which provides a balanced shielding gas flow suitable for a wide range of amperage settings and wire diameters. The nozzle is manufactured from high-grade brass, a material selected for its favorable thermal properties and resistance to spatter adhesion in standard duty applications. With an outside diameter of 0.938 inches, it offers a compact profile that facilitates access to restricted joints while maintaining structural integrity.

A critical specification of the 401-42-50 is its 1/8-inch tip recess relationship. This recess positions the contact tip slightly inside the nozzle bore, providing mechanical protection against short circuits with the workpiece and reducing the accumulation of radiant heat on the tip itself. This geometry helps to extend contact tip life and ensures consistent gas coverage by minimizing the effects of cross-drafts at the arc zone. The bottleneck design further enhances the operator's line of sight to the weld puddle, a vital factor for maintaining weld quality and tracking accuracy during manual operation.

The Tough Lock system utilizes a robust slip-on interface that ensures concentricity between the contact tip and the nozzle. This alignment is essential for uniform gas distribution and preventing porosity defects. The nozzle's internal locking mechanism engages securely with the nozzle retainer, preventing accidental dislodgement due to thermal expansion or mechanical impact, yet allows for tool-free removal when maintenance is required. The smooth surface finish and rounded edges of the brass construction are engineered to minimize the surface area available for spatter to bond, thereby reducing the frequency of cleaning intervals.

This product is supplied in a package of 10 units, ensuring that MRO inventories can be maintained efficiently for high-volume production lines. It is directly compatible with Tregaskiss T-Gun™ MIG guns and other platforms utilizing the Tough Lock consumable series. By integrating genuine OEM components like the 401-42-50, facilities can ensure optimal conductivity, thermal management, and system longevity.