Thermo King M5 Stainless Steel Split Lock Washer 557171
Official OEM Thermo King parts catalog entry for the Thermo King Washer-Lock M5 SS (557171), 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 Washer-Lock M5 SS (557171) provides OEM-grade locking retention for temperature-controlled fleets and supports consistent fastening reliability across Thermo King refrigeration systems. Thermo King refrigeration system integrity depends on secure fasteners; this stainless steel lock washer helps maintain precise clamping force under vibration and thermal cycling.
Key Features & Customer Benefits
- Stainless Steel Construction – Delivers corrosion resistance for long service life in refrigerated and marine environments common to reefer trailers and transport refrigeration.
- M5 Specification – Matches M5 fastener sizing used in Thermo King assemblies for secure, repeatable installation without modification.
- Split Lock Design – Provides spring tension and bite to reduce loosening from vibration and shock, supporting uptime and temperature control reliability.
- OEM Part Number 557171 – Ensures correct replacement on Thermo King components and streamlines parts tracking for fleet maintenance.
- Corrosion & Temperature Resistance – Maintains fastening integrity across typical reefer temperature ranges and outdoor exposure in West Texas and the Permian Basin.
- Compact Profile – Preserves clearance in tight assemblies on Smart Reefer SR-4, Precedent, and Diesel Direct Electric platforms without compromising clamping force.
Product Details
The Thermo King Washer-Lock M5 SS (557171) is a stainless steel split lock washer engineered for use with M5 bolts and screws on Thermo King transport refrigeration equipment. This component provides a vibration-resistant locking action and corrosion resistance suitable for refrigerated trailers, truck-mounted units, and transport refrigeration assemblies. West Texas Thermo King lists this part as an OEM-identified fastening component to support consistent field service and parts inventory management.
Efficiency & Sustainability
Using OEM fastening components like the Washer-Lock M5 SS helps preserve system efficiency by maintaining proper clamp loads that prevent leaks and mechanical wear. Reliable fasteners support consistent temperature control, contributing to fuel-efficient cooling and reduced product loss. This part supports ongoing compliance and long-term sustainability goals for fleets operating Smart Reefer SR-4 and Precedent-series units across CARB Evergreen and regional emissions programs.
Installation & Maintenance Tips
Install the washer with the split ends oriented to maximize locking action and torque to Thermo King recommended values. Inspect lock washers during scheduled maintenance intervals and replace if deformation or corrosion is present. Use OEM-grade fasteners and follow Thermo King service guidelines to ensure precision fit and reliable bolted joints.
Real-World Applications
The Washer-Lock M5 SS (557171) finds regular use in reefer trailer doors, control panel assemblies, compressor mounts, and other fastener points on refrigerated trucks and trailer refrigeration units. Fleet technicians in Amarillo, Lubbock, Odessa, and throughout West Texas install this part to maintain temperature control and prevent downtime on long-haul transport routes.
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 the Washer-Lock M5 SS (557171) compatible with Thermo King Precedent units?
A: Yes. This OEM lock washer is specified for M5 fasteners commonly used in Precedent-series assemblies and other Thermo King transport refrigeration components.
Q: How does this lock washer improve fleet uptime?
A: By maintaining clamping force under vibration and thermal cycling, the washer reduces fastener loosening that can lead to leaks, component movement, and unscheduled service events.
Q: What maintenance interval is recommended for lock washers on reefer equipment?
A: Inspect lock washers during routine service intervals and whenever related hardware is serviced; replace any washer showing deformation, corrosion, or loss of locking action.
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 Washer-Lock M5 SS (557171), 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 Washer-Lock M5 SS (557171) provides OEM-grade locking retention for temperature-controlled fleets and supports consistent fastening reliability across Thermo King refrigeration systems. Thermo King refrigeration system integrity depends on secure fasteners; this stainless steel lock washer helps maintain precise clamping force under vibration and thermal cycling.
Key Features & Customer Benefits
- Stainless Steel Construction – Delivers corrosion resistance for long service life in refrigerated and marine environments common to reefer trailers and transport refrigeration.
- M5 Specification – Matches M5 fastener sizing used in Thermo King assemblies for secure, repeatable installation without modification.
- Split Lock Design – Provides spring tension and bite to reduce loosening from vibration and shock, supporting uptime and temperature control reliability.
- OEM Part Number 557171 – Ensures correct replacement on Thermo King components and streamlines parts tracking for fleet maintenance.
- Corrosion & Temperature Resistance – Maintains fastening integrity across typical reefer temperature ranges and outdoor exposure in West Texas and the Permian Basin.
- Compact Profile – Preserves clearance in tight assemblies on Smart Reefer SR-4, Precedent, and Diesel Direct Electric platforms without compromising clamping force.
Product Details
The Thermo King Washer-Lock M5 SS (557171) is a stainless steel split lock washer engineered for use with M5 bolts and screws on Thermo King transport refrigeration equipment. This component provides a vibration-resistant locking action and corrosion resistance suitable for refrigerated trailers, truck-mounted units, and transport refrigeration assemblies. West Texas Thermo King lists this part as an OEM-identified fastening component to support consistent field service and parts inventory management.
Efficiency & Sustainability
Using OEM fastening components like the Washer-Lock M5 SS helps preserve system efficiency by maintaining proper clamp loads that prevent leaks and mechanical wear. Reliable fasteners support consistent temperature control, contributing to fuel-efficient cooling and reduced product loss. This part supports ongoing compliance and long-term sustainability goals for fleets operating Smart Reefer SR-4 and Precedent-series units across CARB Evergreen and regional emissions programs.
Installation & Maintenance Tips
Install the washer with the split ends oriented to maximize locking action and torque to Thermo King recommended values. Inspect lock washers during scheduled maintenance intervals and replace if deformation or corrosion is present. Use OEM-grade fasteners and follow Thermo King service guidelines to ensure precision fit and reliable bolted joints.
Real-World Applications
The Washer-Lock M5 SS (557171) finds regular use in reefer trailer doors, control panel assemblies, compressor mounts, and other fastener points on refrigerated trucks and trailer refrigeration units. Fleet technicians in Amarillo, Lubbock, Odessa, and throughout West Texas install this part to maintain temperature control and prevent downtime on long-haul transport routes.
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 the Washer-Lock M5 SS (557171) compatible with Thermo King Precedent units?
A: Yes. This OEM lock washer is specified for M5 fasteners commonly used in Precedent-series assemblies and other Thermo King transport refrigeration components.
Q: How does this lock washer improve fleet uptime?
A: By maintaining clamping force under vibration and thermal cycling, the washer reduces fastener loosening that can lead to leaks, component movement, and unscheduled service events.
Q: What maintenance interval is recommended for lock washers on reefer equipment?
A: Inspect lock washers during routine service intervals and whenever related hardware is serviced; replace any washer showing deformation, corrosion, or loss of locking action.
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.