Miller 200258 M-25 MIG Gun Nozzle 1/2-inch Flush Slip-On

Reliable Replacement: Miller 200258 MIG Nozzle

When you are in the middle of a fabrication project, the last thing you need is a clogged or battered nozzle ruining your gas coverage. The Miller 200258 Slip Type Nozzle is the genuine OEM replacement part you need to keep your Millermatic running smoothly. Designed specifically for the M-25 and M-40 MIG guns found on the industry's most popular machines—like the Millermatic 210, 250, 251, and the legendary 252—this nozzle ensures you get the perfect fit and performance that aftermarket knock-offs just can't match.

This particular nozzle features a 1/2-inch (0.500") orifice, which is the standard "go-to" size for most general-purpose MIG welding applications. It provides excellent gas coverage without being so bulky that you can't see your puddle. The "flush" design means your contact tip sits even with the end of the nozzle. Many welders prefer this setup because it offers a great balance: it protects the tip from shorting out against the work while still letting you get close enough to control the arc tightly. It is especially good for seeing what you are doing in tight corners or when welding out of position.

Forget about wrestling with cross-threaded nozzles that seize up when they get hot. The Miller 200258 uses a slip-on design. It slides right over the gas diffuser and stays put thanks to a built-in spring clip inside the nozzle (or on the diffuser depending on the gun generation). When it's time to clean out spatter or swap a contact tip, you just twist and pull—no pliers required (usually). This speed is a lifesaver when you are clocking hours and need to keep the arc on time.

Durability is key in any shop environment. Made from heavy-duty copper, this nozzle withstands the high heat of day-to-day welding and resists spatter buildup better than cheaper alternatives. Whether you are welding mild steel in a garage or fabricating structural components in a production line, having a fresh pack of these nozzles in your toolbox ensures you are always ready to lay down high-quality beads. It also fits Hobart H-series guns, making it a versatile spare part for shops with mixed equipment.