

The Graco 551907 Screw Thumb is a stainless steel thumb screw for easy manual adjustment and secure fastening in spray system components.
| Equipment / Part | Use |
|---|---|
| Graco Spray Gun Assemblies | Manual tightening and adjustment |
| Airless Pump Components | Provides secure fastening without tools |
| Valve Assemblies | Ensures quick and easy adjustments |
The Graco 551907 Screw Thumb allows tool-free installation and adjustment of spray system components. Made from stainless steel, it offers durability, corrosion resistance, and convenience for professional use.