4335 - Bernard Style 4335 Head Assembly Gas Diffuser 10-Pack

Precision 4335 Style Head Assembly for MIG Welding

The Generic 4335 Gas Diffuser Head Assembly is a critical component designed for the rigorous demands of industrial MIG welding. Engineered to serve as a direct replacement for the standard Bernard® 4335 part, this head assembly is compatible with a wide range of air-cooled MIG guns, specifically those rated for 200 Amps and 300 Amps. This component acts as the mechanical and electrical interface between the MIG gun gooseneck and the contact tip, playing a pivotal role in the welding circuit.

Manufactured from high-grade brass, this head assembly offers superior thermal conductivity and electrical efficiency. In the MIG welding process, the transfer of current from the gun cable to the welding wire occurs primarily at the contact tip; however, the head assembly must reliably transmit this current from the neck to the tip without excessive resistance heating. The brass material is selected to withstand the thermal cycling inherent in welding operations while maintaining thread integrity, ensuring that contact tips (specifically the 7400 series) remain securely seated during operation.

Beyond electrical transfer, the 4335 head assembly functions as a gas diffuser. Its geometry is designed to break up the laminar flow of shielding gas coming from the liner and distribute it evenly into the nozzle. This turbulence-free distribution is essential for creating a robust shielding envelope around the weld pool, preventing porosity and atmospheric contamination. This specific model is designed to mate with standard elliptical and cone-style nozzles (such as the 4391 or 4491 series), making it a versatile choice for fabrication shops utilizing legacy Bernard-style front-end consumables.

Supplied in a package of 10, this product ensures that maintenance teams and welding operators have ready access to replacement parts, minimizing downtime associated with component wear or thread stripping. It is an ideal solution for maintaining the performance of Q-Gun, S-Gun, and T-Gun series equipment.