

Hex head cap screw used to secure structural and pump components in Graco spray equipment, ensuring stable fastening under vibration and pressure conditions.
| Equipment Type | Application Use |
|---|---|
| Graco Airless Paint Sprayers | Used in frame and pump assembly fastening points requiring 5/16-18 thread hardware. |
| Graco Piston Pump Systems | Secures internal components within fluid section and pump housing assemblies. |
| Graco Pump Repair Kits | Included as replacement hardware during maintenance or full pump rebuilds. |
| Industrial Spray Equipment Assemblies | Used where Grade 5 steel fastening strength is required for vibration-resistant connections. |
The Graco 0203-21 Screw HHC 5/16-18 x 0.63 MS Gr5 is a hex head cap screw designed for secure mechanical fastening within Graco spray equipment assemblies. Built to Grade 5 (Gr5) strength standards, it delivers reliable clamping force in high-vibration environments commonly found in airless spray systems.
Featuring a 5/16-18 thread pattern and 0.63-inch length, this screw is used to fasten pump components, frames, and structural sections, ensuring alignment and structural integrity during operation.