4478P - Bernard 4478 Replacement O-Ring Kit (10-Pack)

Keep Your Shielding Gas Where It Belongs

There is nothing more frustrating than chasing down a porosity issue in your welds. You check your gas flow, you check your stick-out, you clean your base metal, and you still get pinholes. Often, the culprit is the smallest, cheapest part on your gun: the O-ring. The Bernard 4478P O-Ring (10 Pack) is your insurance policy against gas leaks and the bad welds they cause. Designed specifically for Bernard MIG guns, these O-rings are the unsung heroes that keep your shielding gas flowing smoothly from the machine to the puddle without leaking out at the power pin or the handle.

Over time, the heat from the arc and the wear and tear of dragging your cable around the shop will dry out and crack your O-rings. When that happens, you start losing money—both in wasted gas and in time spent grinding out bad welds. This 10-pack is perfect for the welder who takes pride in their equipment. Toss a pack in your toolbox or locker, and the next time you suspect a leak or do a liner change, swap out the O-ring while you're at it. It takes seconds to do but can save you hours of frustration.

These aren't just generic rubber bands; they are built to withstand the harsh environment of a welding shop. They resist drying out and hold their shape even when things get hot. Whether you are running a Q-Gun or an S-Gun, these seals fit tight and stay tight. Don't let a ten-cent seal ruin a million-dollar project. Keep your gun maintained, your gas coverage perfect, and your beads looking slick with genuine-style replacement parts.

Why Welders Keep These on Hand:

• Instant Fix: Solves mysterious gas coverage issues immediately.
• Shop Tough: Resists oil, grease, and heat better than standard hardware store O-rings.
• Value: With 10 in a pack, you can share with a buddy or keep your whole shop running.
• Peace of Mind: knowing your equipment is sealed tight lets you focus on the arc.