Graco 15C258 Hex Jam Nut
The Graco 15C258 Hex Jam Nut is a precision locking nut used to secure components and assemblies within Graco fluid systems. Its robust design ensures that critical parts remain fixed and stable during operation, reducing vibration‑induced loosening.
Compatible Machines
- Graco airless sprayer pump assemblies
- Graco diaphragm and proportioning systems
- Graco fluid manifolds and high-pressure connections
Key Features
- Hexagonal shape for easy tightening with a wrench
- Durable metal construction built for industrial fluid systems
- Corrosion-resistant finish to maintain longevity
- Precisely machined threads to prevent loosening under vibration
- Compact form factor for use in tight or confined assemblies
Benefits
- Secures critical connections to maintain system integrity
- Prevents components from loosening during high-pressure operation
- Improves overall system reliability and safety
- Easy to install, inspect, and replace during maintenance
Technical Specifications
| Part Number | 15C258 |
| Type | Hex Jam Nut |
| Material | Metal, corrosion-resistant |
| Thread Type | Standard NPT or compatible threaded connection |
| Weight | Approx. 0.1 lb / 0.045 kg |
| Dimensions | Approx. 1.2 in height, 2.4 in width (across flats) |
| Use Case | Locking and securing fluid system components under vibration |
Installation Tips
- Clean the threads before installation to ensure a proper fit
- Use a wrench that matches the hex size to avoid rounding corners
- Do not overtighten — apply recommended torque for your system
- Inspect the jam nut periodically; retighten if vibration loosens it
Why Use the 15C258 Jam Nut?
The 15C258 provides reliable locking capability in Graco systems, protecting critical connections and preventing loosening due to vibration or pressure cycles. It's an essential component for maintaining the stability and safety of your fluid-handling equipment.
Frequently Asked Questions
A jam nut is used as a locking nut to secure another nut or component in place, preventing it from loosening under vibration or pressure.
Yes, you can reuse it if the threads and nut are in good condition, but check for wear or damage before reinstalling.
Yes, it is designed to be durable and robust enough for use in Graco high-pressure fluid systems, provided it’s installed correctly.
