N-A5814CM - Miller AccuLock S Copper Nozzle 5/8 Inch Orifice 1/4 Inch Recess

Reliable Performance for Professional Welders

Take your welding performance to the next level with the Miller AccuLock™ S Large Thread-On Copper Nozzle. If you are running a Miller MDX-250 MIG gun or a Bernard BTB series gun, you know that the quality of your consumables directly impacts the quality of your bead. This nozzle, part number N-A5814CM, is built to handle the heat and abuse of daily fabrication work. Constructed from durable copper, it stands up to high temperatures far better than standard brass nozzles, meaning you spend less time swapping out melted or deformed parts and more time laying down metal. The copper material also resists spatter adhesion, making it easier to clean out your nozzle with a pair of welpers or a reamer during breaks.

The geometry of this nozzle is designed with the welder in mind. It features a wide 5/8-inch orifice, which provides a broad umbrella of shielding gas. This is perfect for when you need to crank up the voltage and wire speed, ensuring your weld pool stays protected from the atmosphere even when moving fast. Additionally, the 1/4-inch tip recess is a game-changer for contact tip life. By recessing the tip slightly back into the nozzle, it stays cooler and is less likely to get clogged with spatter if you accidentally get too close to the puddle. This recess is ideal for most general fabrication tasks where visibility and gas coverage need to be balanced.

One of the biggest frustrations in MIG welding is a loose or wobbly nozzle that messes up your gas flow. The AccuLock S system solves this with a secure thread-on design. When you screw this nozzle onto your diffuser, it seats firmly and aligns perfectly with the contact tip. You don't have to worry about it falling off or vibrating loose while you are in the middle of a critical pass. The coarse threads are designed to resist seizing, so when it is finally time to change the nozzle, it comes off without a fight. Whether you are working in a production shop, a garage, or out in the field, this Miller nozzle delivers the consistency and durability you need to produce professional-grade welds every time.