The Grex X40NS.16 1.6mm Nozzle Kit for X4000 Spray Gun is a replacement nozzle set for the Grex X4000 spray gun. This is a spray gun nozzle kit designed for restoring or changing fluid delivery for heavier coating applications. Model Number: X40NS.16. If your spray gun needs the correct matched internals for a 1/16" (1.6 mm) setup, this is the service part that gets you there.

What matters here is that this is not just one loose wear part. The kit includes a matched air cap, fluid needle, and fluid nozzle. That matters on a spray gun because those parts work as a system. When they are matched correctly, you have a better shot at maintaining the intended fluid flow, atomization, and pattern shape instead of chasing performance problems caused by mixed components.

For users spraying heavier industrial body coatings and polyester primers, the 1.6 mm nozzle size is the key detail. According to the available product data, this setup supports a fluid output of 180 cc per minute and a spray pattern width of 12-5/8" (320 mm). In practical terms, that means this Grex spray gun nozzle kit is aimed at jobs where material build and coverage matter more than ultra-fine detail work.

The Grex X40NS.16 1.6mm Nozzle Kit for X4000 Spray Gun is a straightforward maintenance and setup item, but it has a real effect on finish quality. Worn needles and nozzles can lead to poor atomization, uneven fan shape, and wasted material. Replacing the full matched set instead of one piece at a time is usually the cleaner fix when the gun is no longer spraying the way it should.

Compatibility is simple and important: this kit is made for the Grex X4000 spray gun. That product-specific fit is what separates it from generic spray gun parts that may look close but do not deliver the same result. If you are maintaining an X4000 or setting one up for heavier material, using the correct Grex nozzle kit saves time and avoids the guesswork.

This is best suited for painters, finishers, body shop users, and industrial coating work where the X4000 is already in service. It also makes sense for anyone keeping spare spray gun parts on hand so downtime does not turn into a lost day. If you own the X4000 and need the proper 1.6 mm spray gun nozzle kit, this is the right place to start.

Grex X40NS.16 1.6mm Nozzle Kit for X4000 Spray Gun Keeps Your Gun Working Like It Should

This is the kind of replacement kit that makes sense to buy before you actually need it, especially if your X4000 earns its keep.

• Who it's for: Painters and finish users running a Grex X4000 for heavier coatings, primers, and general spray gun service work.
• Why it stands out: You are getting the full matched nozzle set, not a random single part, and that is the smarter way to restore spray performance.
• Worth knowing: This is a fit-specific service kit for the X4000, so it is the right buy if you own that gun and need the 1/16" (1.6 mm) setup.

• What spray gun is this nozzle kit made for? It is made for the Grex X4000 spray gun.
• What nozzle size is included? This kit is specified as a 1.6 mm nozzle kit.
• What type of material is it suited for? Available product data points to heavier industrial body coatings and polyester primers.
• Does this include matched internal parts? Yes. The kit includes an air cap, fluid needle, and fluid nozzle.