Graco 15A817 Sensor Nut – Product Overview
Compatible Systems
| System / Model Type | Description |
| Graco Xtreme Mix Proportioning Systems | Sensor assemblies mounted to control boxes or pumps |
| Graco Sensor‑Equipped Pump Modules | Pumps with integrated fluid or mix ratio sensors using 1/8″ NPT thread |
| Graco Control Box Sensor Stations | Electrical sensor interfaces where the nut secures the sensor to panel or block |
Product Description
The Graco 15A817 Sensor Nut is a specialized fastening component designed to securely hold a sensor assembly in place within Graco fluid‑mix, proportioning, or pump control systems.
Positioned between the sensor body and the mounting plate or manifold block, this nut ensures proper mechanical retention, accurate sensor alignment, and a reliable electrical and fluid interface. Its design supports systems where vibration, pressure, and frequent maintenance are factors, helping maintain integrity of the sensor installation.
Key Features
- Designed specifically for sensor assemblies in Graco proportioning and control systems
- Threaded to match 1/8″ NPT (or equivalent) sensor interface for secure mount
- Durable metal construction to withstand system vibration and repeated servicing
- Ensures proper sealing and alignment of the sensor element within the control module
- Enables quick removal and re‑installation of sensors during maintenance or calibration
Technical Specifications
| Part Number | 15A817 |
| Component Type | Sensor Mounting Nut |
| Thread Size | 1/8″ NPT (sensor mounting thread) |
| Function | Secures sensor to housing or manifold block, ensures proper alignment and sealing |
| Material | Metal alloy — durable for industrial use |
| Serviceability | Designed to be installed and removed multiple times for maintenance |
Installation & Maintenance Tips
- Depressurize or shut down sensor circuit before loosening the nut.
- Ensure the sensor body is fully seated before installing the 15A817 nut for optimal alignment.
- Use correct torque value (as specified for the sensor assembly) to avoid overtightening and damaging threads or sensor housing.
- Inspect the nut periodically for signs of galling, wear or corrosion—replace if thread integrity or function is compromised.
- During sensor removal, ensure no damage to the mounting surface or sensor probe threads for proper re‑installation.
Frequently Asked Questions
It is used in Graco fluid‑mix or proportioning systems with sensor modules, and other control modules requiring secure sensor mounting.
Yes — the nut is made from a robust metal alloy and is designed for multiple installs, provided the threads and fit remain in good condition.
Check for damaged or stripped threads, signs of corrosion, proper torque retention, and ensure the sensor probe is correctly aligned when the nut is tightened.
