The Grex X40NS.10 1.0mm Nozzle Kit, for X4000 Spray Gun is a replacement and changeover kit for the Grex X4000 spray gun. This is a spray gun nozzle kit designed for base coat application. Model Number: X40NS.10. If you need to restore an X4000 to proper spray performance or switch to a 1/16" (1.0 mm) setup for the kind of material this size is meant to handle, this kit gives you the matched internal parts instead of making you hunt them down separately.

What matters here is that this is not just a single nozzle. Grex includes the matching air cap, fluid needle, and fluid nozzle. On a spray gun, those parts work as a system. When they are matched correctly, you get more consistent atomization, a more predictable spray pattern, and less time wasted trying to tune around worn or mismatched parts.

The 1/16" (1.0 mm) size is backed by the listed performance numbers: 110 cc/min fluid output and a 11-7/16" (290 mm) pattern width. In practical terms, that gives the X4000 a setup suited to base coats where you want even material delivery and efficient coverage without moving into a larger, heavier-output configuration than the job calls for.

For anyone maintaining a professional paint setup, replacement condition matters just as much as gun quality. A worn needle or nozzle can change flow, affect pattern consistency, and make cleanup and adjustment more frustrating than it should be. Swapping in a complete matched set is usually the smarter move when performance starts drifting, especially if the gun is used regularly.

Because this kit is specifically for the Grex X4000 spray gun, it makes more sense than trying to adapt generic parts. Fit and spray behavior on finishing equipment are not places to improvise. If your goal is to keep the gun working the way it was designed to, model-specific components are the safe bet.

This kit is best suited to painters and finish users who already run a Grex X4000 and want a dedicated 1/16" (1.0 mm) setup for base coats, maintenance, or a fresh rebuild of the fluid path parts. It is also a practical buy for anyone who wants to keep a spare matched set on hand so downtime does not stop the job.

Grex X40NS.10 1.0mm Nozzle Kit, for X4000 Spray Gun Keeps Your X4000 Honest

If your X4000 needs a proper 1/16" (1.0 mm) setup for base coats, this is the right kind of kit because it gives you the matched wear parts that actually control how the gun sprays.

• Who it's for: Painters and finish users running a Grex X4000 who need a replacement nozzle kit or want a dedicated 1/16" (1.0 mm) setup.
• Why it stands out: It includes the matching air cap, fluid needle, and fluid nozzle, which is the smart way to keep spray pattern and atomization consistent.
• Worth knowing: This is a model-specific kit for the X4000, so it is a great maintenance or changeover buy, but only if that is the gun you are running.

• What spray gun does this kit fit? It is designed for the Grex X4000 spray gun.
• What nozzle size is this? This is a 1.0 mm nozzle kit.
• What is it intended for? The listed suggested application is base coats.
• What kind of output and pattern does it provide? The published figures are 110 cc/min fluid output and an 11-7/16" (290 mm) pattern width.