Thermo King Vibration-Resistant Hex Lock Nut M5 SZN 557011
Official OEM Thermo King parts catalog entry for the Thermo King Hex Lock Nut M5 SZN (Part 557011), verified by PEAK Thermo King and West Texas Thermo King Texas, Utah, Wyoming, Washington, Oregon, serving all of the USA.
Built for Performance: The Thermo King Hex Lock Nut M5 SZN (Part 557011) secures critical fastener points across Thermo King refrigeration systems, delivering vibration-resistant retention and dependable service for transport refrigeration and reefer trailer applications. West Texas Thermo King lists this OEM fastener as a precision component for maintaining uptime in demanding fleet operations.
Key Features & Customer Benefits
- OEM Part Number 557011 – Ensures correct specification and traceability for Thermo King service and repairs.
- M5 Thread Size – Provides common metric engagement for secure fastening in control panels, brackets, and light assemblies.
- Locking Hex Design – Resists loosening under vibration to protect system integrity and reduce unscheduled downtime.
- Precision Fit – Matches Thermo King fastener tolerances to maintain assembly alignment and sealing where required.
- Fleet Reliability – Supports continuous operation for refrigerated trucks and reefer trailers operating across West Texas and the Permian Basin.
- Certified Supply – Distributed by a certified Thermo King dealership for authentic OEM quality and service support.
Product Details
| Part Number | 557011 |
| Product Name | Thermo King Hex Lock Nut M5 SZN |
| Thread Size | M5 |
| Type | Hex lock nut (vibration resistant) |
| Manufacturer | Thermo King (OEM) |
| Material | Per Thermo King OEM specification |
| Compatibility | Thermo King refrigeration systems and associated assemblies |
Efficiency & Sustainability
Using OEM fasteners like the Hex Lock Nut M5 SZN supports fuel-efficient cooling and long-term system efficiency by maintaining proper assembly torque and alignment. Genuine Thermo King components integrate with Smart Reefer SR-4 and Diesel Direct Electric systems to preserve measured performance and help fleets meet operational and emissions objectives where applicable.
Installation & Maintenance Tips
Install using specified torque values and OEM-grade tools. Use Thermo King approved washers or clamps where required and inspect lock nuts during scheduled maintenance intervals. Replace lock-style fasteners showing wear or thread damage to preserve vibration resistance and assembly reliability.
Real-World Applications
This hex lock nut secures panels, brackets, sensors, and accessory mounts on reefer trailers, refrigerated trucks, and Thermo King units installed in fleet refrigeration systems. It performs in high-vibration environments common to regional haul and long-distance refrigerated transport.
Available for installation and service in Amarillo, Lubbock, Odessa, and throughout West Texas.
Backed by Thermo King’s engineering and supported by certified technicians at West Texas Thermo King, this component delivers lasting performance and uptime assurance for fleet operations.
For product verification or service assistance, call (806) 376-5837.
For current warranty eligibility or OEM replacement coverage, please contact us for warranty information or contact our service department for confirmation.
Frequently Asked Questions
Q: Is this nut compatible with Thermo King Precedent or S-series units?
A: Yes. As an OEM-designated fastener, the Hex Lock Nut M5 SZN fits a range of Thermo King refrigeration assemblies and service applications where an M5 lock nut is specified.
Q: How does the locking feature improve fleet uptime?
A: The prevailing-lock design resists vibration-induced loosening, reducing fastener-related failures and minimizing unscheduled stops for reefer trailers and refrigerated trucks.
Q: Are OEM fasteners required for warranty or service work?
A: Thermo King recommends OEM parts for consistent fit, function, and traceability. Confirm specific warranty requirements with service personnel during scheduled maintenance.
Q: Can this part be used in exterior exposed locations?
A: Use per Thermo King installation guidance. Replace any fasteners that show corrosion or thread degradation during inspections to preserve secure assemblies.
Related Resources
Ask about fleet-wide parts programs through West Texas Thermo King.
Produced by a certified Thermo King dealership, West Texas Thermo King | a Division of PEAK Industrial. Servicing fleets across Amarillo, Lubbock, and Odessa.
Official OEM Thermo King parts catalog entry for the Thermo King Hex Lock Nut M5 SZN (Part 557011), verified by PEAK Thermo King and West Texas Thermo King Texas, Utah, Wyoming, Washington, Oregon, serving all of the USA.
Built for Performance: The Thermo King Hex Lock Nut M5 SZN (Part 557011) secures critical fastener points across Thermo King refrigeration systems, delivering vibration-resistant retention and dependable service for transport refrigeration and reefer trailer applications. West Texas Thermo King lists this OEM fastener as a precision component for maintaining uptime in demanding fleet operations.
Key Features & Customer Benefits
- OEM Part Number 557011 – Ensures correct specification and traceability for Thermo King service and repairs.
- M5 Thread Size – Provides common metric engagement for secure fastening in control panels, brackets, and light assemblies.
- Locking Hex Design – Resists loosening under vibration to protect system integrity and reduce unscheduled downtime.
- Precision Fit – Matches Thermo King fastener tolerances to maintain assembly alignment and sealing where required.
- Fleet Reliability – Supports continuous operation for refrigerated trucks and reefer trailers operating across West Texas and the Permian Basin.
- Certified Supply – Distributed by a certified Thermo King dealership for authentic OEM quality and service support.
Product Details
| Part Number | 557011 |
| Product Name | Thermo King Hex Lock Nut M5 SZN |
| Thread Size | M5 |
| Type | Hex lock nut (vibration resistant) |
| Manufacturer | Thermo King (OEM) |
| Material | Per Thermo King OEM specification |
| Compatibility | Thermo King refrigeration systems and associated assemblies |
Efficiency & Sustainability
Using OEM fasteners like the Hex Lock Nut M5 SZN supports fuel-efficient cooling and long-term system efficiency by maintaining proper assembly torque and alignment. Genuine Thermo King components integrate with Smart Reefer SR-4 and Diesel Direct Electric systems to preserve measured performance and help fleets meet operational and emissions objectives where applicable.
Installation & Maintenance Tips
Install using specified torque values and OEM-grade tools. Use Thermo King approved washers or clamps where required and inspect lock nuts during scheduled maintenance intervals. Replace lock-style fasteners showing wear or thread damage to preserve vibration resistance and assembly reliability.
Real-World Applications
This hex lock nut secures panels, brackets, sensors, and accessory mounts on reefer trailers, refrigerated trucks, and Thermo King units installed in fleet refrigeration systems. It performs in high-vibration environments common to regional haul and long-distance refrigerated transport.
Available for installation and service in Amarillo, Lubbock, Odessa, and throughout West Texas.
Backed by Thermo King’s engineering and supported by certified technicians at West Texas Thermo King, this component delivers lasting performance and uptime assurance for fleet operations.
For product verification or service assistance, call (806) 376-5837.
For current warranty eligibility or OEM replacement coverage, please contact us for warranty information or contact our service department for confirmation.
Frequently Asked Questions
Q: Is this nut compatible with Thermo King Precedent or S-series units?
A: Yes. As an OEM-designated fastener, the Hex Lock Nut M5 SZN fits a range of Thermo King refrigeration assemblies and service applications where an M5 lock nut is specified.
Q: How does the locking feature improve fleet uptime?
A: The prevailing-lock design resists vibration-induced loosening, reducing fastener-related failures and minimizing unscheduled stops for reefer trailers and refrigerated trucks.
Q: Are OEM fasteners required for warranty or service work?
A: Thermo King recommends OEM parts for consistent fit, function, and traceability. Confirm specific warranty requirements with service personnel during scheduled maintenance.
Q: Can this part be used in exterior exposed locations?
A: Use per Thermo King installation guidance. Replace any fasteners that show corrosion or thread degradation during inspections to preserve secure assemblies.
Related Resources
Ask about fleet-wide parts programs through West Texas Thermo King.
Produced by a certified Thermo King dealership, West Texas Thermo King | a Division of PEAK Industrial. Servicing fleets across Amarillo, Lubbock, and Odessa.