

Packing retention nut designed to secure and compress seal packings inside Graco pump assemblies, ensuring stable pressure control and leak-free operation.
| Equipment | Application Details |
|---|---|
| Graco Airless Paint Sprayers | Used in pump packing assemblies to secure and compress seal components. |
| Graco LineLazer Striping Systems | Compatible with pump sections requiring packing retention hardware. |
| Graco LineDriver Integrated Systems | Used in hydraulic and fluid pump assemblies supporting pressure control. |
| Professional Contractor Sprayers | Fits select OEM pump designs requiring packing nut retention. |
Note: Always confirm compatibility using the pump assembly breakdown for your specific Graco model.
The 15W963 Nut is a Packing retention component used in Graco pump assemblies to secure and compress sealing elements within the fluid section.
It ensures proper packing alignment and consistent sealing pressure, helping maintain optimal pump performance and preventing fluid leakage during high-pressure operation.
Designed for durability and precise fit, it is commonly replaced during pump rebuilds and maintenance of professional spraying equipment.