Graco 15G204 Retaining Nut
The Graco 15G204 Retaining Nut securely holds pump packing components in place, ensuring stable performance and leak-free operation in 4 GPM spray systems.
- OEM Graco part – precise fit and durability
- Compatible with GH-833 and 287834 pumps
- High-strength, corrosion-resistant metal design
- Ideal for professional airless sprayer assemblies
Compatible Machines for the 15G204 Nut, Retaining
- Graco GH-833 Displacement Pump (4 GPM flow band)
- Graco 287834 Displacement Pump (4 GPM flow band)
- Graco ProContractor Series Pump Kits – 4 GPM models
Product Overview
The 15G204 Nut, Retaining is a critical fastening component engineered for demanding airless spray systems. It secures the internal assemblies of high-performance pump modules, maintaining alignment and preload of sealing stacks in 4 GPM equipment.
Key Features
| Part Number | 15G204 |
|---|---|
| Flow Band | 4 GPM |
| Function | Retaining nut that holds pump rod packing/seal assemblies under axial load |
| Construction | High-strength stainless steel or hardened alloy, precision-machined threads |
Materials & Performance
Manufactured from high-grade stainless steel or a hardened alloy, this retaining nut is built for robust service in aggressive spraying environments. The precision-turned threads ensure even load distribution, reduce risk of loosening under vibration, and help protect adjacent seal components from premature wear.
Installation & Maintenance
- Use a calibrated torque wrench to install—proper preload prevents thread galling and ensures long service life.
- Inspect the nut and mating housing threads periodically, especially after exposure to abrasive or chemically aggressive coatings.
- Replace the nut if you observe radial play, thread deformation, loosening under load, or leakage at the interface.
- Maintain upstream filtration and keep fluid systems clean to optimize overall component lifespan.
Applications
This component is suitable for industrial airless spray systems, plural-component equipment, fluid dispensing modules and high-volume finishing lines. Wherever consistent rod alignment, seal integrity and minimal downtime are priorities, the 15G204 retaining nut supports professional performance.
Frequently Asked Questions
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