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

Packaging: 5 in a pack
$24.93/ea $87.75/5 in a pack only $17.55/eaSave 30%

In stock

OVERVIEW

Keep Your Bernard Gun Running Smoothly

Every welder knows that the front end of the MIG gun takes the most abuse. Spatter buildup, heat stress, and constant tip changes can wear out your head assembly fast. The 4335 Style Head Assembly (10-Pack) is your go-to solution for refreshing the business end of your 200 Amp or 300 Amp Bernard-style MIG gun. If you are running the classic elliptical or cone nozzles, this is the part that holds it all together.

Why replace just one when you can stock up? This 10-pack gives you the best bang for your buck, ensuring you aren't left scrambling for a spare when threads strip out or the diffuser gets clogged with spatter in the middle of a job. These heads are built from durable brass, designed to handle the heat of day-to-day fabrication. They screw right onto your existing gooseneck and accept the standard 7400 series contact tips you likely already have in your inventory.

A worn-out head assembly can cause all sorts of headaches, from erratic arcs due to poor conductivity to porosity caused by bad gas coverage. By swapping in a fresh 4335 diffuser, you ensure a tight electrical connection and smooth gas flow. It’s a simple maintenance step that keeps your welds clean and your machine running efficiently. Whether you are welding mild steel in a production line or doing custom fabrication, these diffusers deliver the reliability you expect from professional-grade consumables.

Key Features for the Shop:

  • Perfect Fit: Designed for 200A and 300A Bernard-style guns (Q-Gun, S-Gun, T-Gun).
  • Standard Consumables: Works with your existing 7400 tips and elliptical nozzles.
  • Value Pack: Comes with 10 units so you are always prepared.
  • Solid Brass: Tough construction that stands up to shop abuse.
Additional Information
Brand:Bernard Style
Item:Gas Diffuser
Amperage:200 A, 300 A
Packaging Description:10 in a pack
Front End:Bernard
Material:Brass
Compatible Gun Series:Bernard Q-Gun, Bernard S-Gun, Bernard T-Gun
Compatible Tip Series:7400 Series
Compatible Nozzle Type:Elliptical, Cone
Part Type:Head Assembly

INCLUDED

  • 10 x 4335 Gas Diffuser Head Assemblies (Bernard Style)

APPLICATIONS

  • General Fabrication
  • Automotive Repair
  • Structural Steel Welding
  • Maintenance and Repair Operations (MRO)
  • Farm and Agriculture Equipment Repair
  • Light to Medium Industrial Manufacturing

FAQ

The 4335 head assembly is designed for Bernard-style 200 Amp and 300 Amp MIG guns, including the Q-Gun, S-Gun, and T-Gun series.

This head assembly accepts standard 7400 series contact tips. It is not compatible with Centerfire series tips.

No, the 4335 head assembly is designed for the standard legacy elliptical or cone nozzles (like the 4391 or 4491). Centerfire systems use a different diffuser (DS-1 or D-1).

It is machined from high-quality brass to ensure excellent electrical conductivity and heat resistance.

This product is sold as a package of 10 head assemblies.

This is a high-quality generic replacement part manufactured to meet or exceed the specifications of the original Bernard 4335.

You should replace the head assembly if the threads for the contact tip become stripped, if the gas holes are irreversibly clogged with spatter, or if the seating surface is damaged causing gas leaks.

While it may physically fit some goosenecks, the 4335 is specifically rated for 200 and 300 Amp applications. For 400 Amp guns, a heavier-duty head assembly (like the 4435 or 4635) is typically recommended to handle the higher heat input.