

The Graco 866338 Shoulder Screw provides precise alignment and secure fastening in Graco pump and mechanical assemblies. Essential for maintaining proper function in triggers, linkages, and internal components.
The Graco 866338 Screw, Shoulder, Socket HD (Modified) is a genuine OEM fastener designed to provide secure mechanical fastening in Graco assemblies. This modified shoulder screw features a socket head for precision installation and reliable holding strength in high‑stress components. :contentReference[oaicite:1]{index=1}
This shoulder screw is used wherever a precision socket shoulder screw is required in mechanical subassemblies for various Graco machines, including:
| Part Number | 866338 |
|---|---|
| Component Type | Shoulder screw, socket HD (modified) |
| Design | Precision socket head with shoulder for alignment |
| Function | Secures assemblies where precise alignment and strength are needed |
| Use | Fastening in mechanical and pump assemblies |
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