Thermo King Hex Head M8 x 1.25 Metric Screw SZN 556479
Official OEM Thermo King parts catalog entry for the Thermo King Screw-HH M8 x 1.25 SZN, 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 Screw-HH M8 x 1.25 SZN delivers OEM-grade fastening reliability for Thermo King refrigeration systems and service applications. This hex head, metric-thread fastener supports dependable assembly and serviceability across transport refrigeration platforms used by fleets in West Texas and the Permian Basin.
Key Features & Customer Benefits
- OEM Fit – Engineered to meet Thermo King fastening specifications for consistent fit and secure installation across compatible components.
- Hex Head Design – Provides straightforward installation and removal with standard tools for faster service and reduced downtime.
- M8 x 1.25 Metric Thread – Common metric sizing ensures secure mechanical engagement for reefer trailer and truck refrigeration assemblies.
- Service-Ready – Supports scheduled maintenance and field repairs, helping fleets maintain temperature control and uptime.
- Fleet Proven Reliability – Trusted in transport refrigeration applications where precision and durability contribute directly to fuel-efficient cooling and cargo protection.
Product Details
| Part Number | 556479 |
| Product Name | Thermo King Screw-HH M8 x 1.25 SZN |
| Thread Size | M8 x 1.25 |
| Head Type | Hex head (HH) |
| Compatibility | Designed for Thermo King refrigeration unit service and assembly; confirm model-specific fitment |
Efficiency & Sustainability
This OEM fastener contributes to reliable temperature control and reduced unplanned downtime, supporting overall fleet efficiency. Proper use of Thermo King parts helps maintain energy-efficient refrigeration operation across Smart Reefer SR-4, Precedent-series, and Diesel Direct Electric applications by preserving sealed assemblies and system integrity.
Installation & Maintenance Tips
Install using the correct hex driver and specified torque values from the Thermo King service manual. Inspect fasteners during routine maintenance intervals and replace any that show wear or corrosion. Use OEM replacement fasteners to ensure consistent clamping force and long-term serviceability.
Real-World Applications
The Thermo King Screw-HH M8 x 1.25 SZN is used in reefer trailers, refrigerated trucks, and stationary transport refrigeration assemblies where metric hex head fasteners secure panels, brackets, and subsystem components. Technicians rely on this part for repeatable service and dependable temperature control on route.
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, contact us for warranty information: https://www.trailerservicesofwesttexas.com/contact.
Frequently Asked Questions
Q: Is this screw compatible with Thermo King Precedent units?
A: Fasteners that use M8 x 1.25 metric threads fit many Thermo King assemblies. Confirm model-specific fitment by referencing the unit parts diagram or consulting a certified technician.
Q: Which tools are recommended for installation?
A: Use the correct hex driver and follow Thermo King torque specifications during installation to ensure secure fastening and consistent sealing.
Q: Can this part be used in refrigerated trailers operating in harsh environments?
A: This OEM screw is intended for transport refrigeration applications. Inspect fasteners regularly and replace any showing damage or corrosion as part of preventive maintenance.
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 Screw-HH M8 x 1.25 SZN, 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 Screw-HH M8 x 1.25 SZN delivers OEM-grade fastening reliability for Thermo King refrigeration systems and service applications. This hex head, metric-thread fastener supports dependable assembly and serviceability across transport refrigeration platforms used by fleets in West Texas and the Permian Basin.
Key Features & Customer Benefits
- OEM Fit – Engineered to meet Thermo King fastening specifications for consistent fit and secure installation across compatible components.
- Hex Head Design – Provides straightforward installation and removal with standard tools for faster service and reduced downtime.
- M8 x 1.25 Metric Thread – Common metric sizing ensures secure mechanical engagement for reefer trailer and truck refrigeration assemblies.
- Service-Ready – Supports scheduled maintenance and field repairs, helping fleets maintain temperature control and uptime.
- Fleet Proven Reliability – Trusted in transport refrigeration applications where precision and durability contribute directly to fuel-efficient cooling and cargo protection.
Product Details
| Part Number | 556479 |
| Product Name | Thermo King Screw-HH M8 x 1.25 SZN |
| Thread Size | M8 x 1.25 |
| Head Type | Hex head (HH) |
| Compatibility | Designed for Thermo King refrigeration unit service and assembly; confirm model-specific fitment |
Efficiency & Sustainability
This OEM fastener contributes to reliable temperature control and reduced unplanned downtime, supporting overall fleet efficiency. Proper use of Thermo King parts helps maintain energy-efficient refrigeration operation across Smart Reefer SR-4, Precedent-series, and Diesel Direct Electric applications by preserving sealed assemblies and system integrity.
Installation & Maintenance Tips
Install using the correct hex driver and specified torque values from the Thermo King service manual. Inspect fasteners during routine maintenance intervals and replace any that show wear or corrosion. Use OEM replacement fasteners to ensure consistent clamping force and long-term serviceability.
Real-World Applications
The Thermo King Screw-HH M8 x 1.25 SZN is used in reefer trailers, refrigerated trucks, and stationary transport refrigeration assemblies where metric hex head fasteners secure panels, brackets, and subsystem components. Technicians rely on this part for repeatable service and dependable temperature control on route.
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, contact us for warranty information: https://www.trailerservicesofwesttexas.com/contact.
Frequently Asked Questions
Q: Is this screw compatible with Thermo King Precedent units?
A: Fasteners that use M8 x 1.25 metric threads fit many Thermo King assemblies. Confirm model-specific fitment by referencing the unit parts diagram or consulting a certified technician.
Q: Which tools are recommended for installation?
A: Use the correct hex driver and follow Thermo King torque specifications during installation to ensure secure fastening and consistent sealing.
Q: Can this part be used in refrigerated trailers operating in harsh environments?
A: This OEM screw is intended for transport refrigeration applications. Inspect fasteners regularly and replace any showing damage or corrosion as part of preventive maintenance.
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.