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Thermo King Countersunk Flat Head Hex Socket Screw 1/4-20 556039
Official OEM Thermo King parts catalog entry for the Thermo King Screw Flat Head Socket 1/4-20 Part 556039, 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 Flat Head Socket 1/4-20 Part 556039 delivers OEM-grade fastening for Thermo King refrigeration systems, ensuring a flush, secure installation that supports consistent temperature control and reliable operation across transport refrigeration applications.
Key Features & Customer Benefits
1/4-20 UNC Thread – Provides standard coarse-thread engagement for reliable clamping strength in common Thermo King assemblies.
Flat, Countersunk Head – Sits flush with panel and bracket surfaces to prevent interference and preserve aerodynamic and service access profiles.
Hex Socket Drive – Enables precise torque application with Allen tools for repeatable, secure tightening during fleet maintenance.
OEM Fitment – Designed to meet Thermo King engineering requirements for transport refrigeration mounting points and component fastenings.
Corrosion-Resistant Options – Available in materials and finishes suited to refrigerated transport environments to extend service life and reduce replacement frequency.
Serviceability – Supports fast removal and reinstallation during scheduled inspections and component swaps, minimizing downtime.
Efficiency & Sustainability
This fastener supports efficient, low-drag installations that preserve thermal integrity and reduce service time. When specified with corrosion-resistant finishes, the part contributes to longer service intervals and fewer replacements, aligning with fleet goals for uptime and responsible material use. Thermo King platforms such as Precedent S-610M, S-610DE, and Smart Reefer SR-4 commonly rely on OEM-grade fasteners to maintain temperature control and fuel-efficient cooling for refrigerated loads.
Installation & Maintenance Tips
Use correct-size Allen keys and calibrated torque tools to achieve specified clamp values for panels and brackets. Inspect threads and countersink surfaces during scheduled maintenance and replace any fasteners showing corrosion or wear. Use OEM-recommended hardware when available to ensure secure fitment and leak-free assemblies.
Real-World Applications
Part 556039 installs on reefer trailers, refrigerated trucks, and transport refrigeration assemblies where a flush, secure fastening is required—panels, mounting brackets, and component housings. Certified technicians fit this fastener during new builds, retrofit projects, and routine service to preserve temperature control and reliability. 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 the service department for confirmation.
Frequently Asked Questions
Q: Is this screw compatible with Thermo King Precedent units?
A: Yes. Part 556039 matches standard fastening points used in Thermo King Precedent installations when the specified thread and head style are required.
Q: What drive tool is required for installation?
A: A properly sized hex (Allen) key or bit is required to apply accurate torque and ensure a flush countersunk finish without damaging the head.
Q: Are corrosion-resistant options available for use in coastal or harsh environments?
A: Corrosion-resistant material and finish options are available to extend service life in demanding transport refrigeration conditions; specify material requirements at time of order.
Q: Can this part be used during routine fleet service without special adapters?
A: Yes. The 1/4-20 UNC thread and hex socket drive conform to common workshop tooling and maintenance workflows for rapid service.
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 Flat Head Socket 1/4-20 Part 556039, 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 Flat Head Socket 1/4-20 Part 556039 delivers OEM-grade fastening for Thermo King refrigeration systems, ensuring a flush, secure installation that supports consistent temperature control and reliable operation across transport refrigeration applications.
Key Features & Customer Benefits
1/4-20 UNC Thread – Provides standard coarse-thread engagement for reliable clamping strength in common Thermo King assemblies.
Flat, Countersunk Head – Sits flush with panel and bracket surfaces to prevent interference and preserve aerodynamic and service access profiles.
Hex Socket Drive – Enables precise torque application with Allen tools for repeatable, secure tightening during fleet maintenance.
OEM Fitment – Designed to meet Thermo King engineering requirements for transport refrigeration mounting points and component fastenings.
Corrosion-Resistant Options – Available in materials and finishes suited to refrigerated transport environments to extend service life and reduce replacement frequency.
Serviceability – Supports fast removal and reinstallation during scheduled inspections and component swaps, minimizing downtime.
Efficiency & Sustainability
This fastener supports efficient, low-drag installations that preserve thermal integrity and reduce service time. When specified with corrosion-resistant finishes, the part contributes to longer service intervals and fewer replacements, aligning with fleet goals for uptime and responsible material use. Thermo King platforms such as Precedent S-610M, S-610DE, and Smart Reefer SR-4 commonly rely on OEM-grade fasteners to maintain temperature control and fuel-efficient cooling for refrigerated loads.
Installation & Maintenance Tips
Use correct-size Allen keys and calibrated torque tools to achieve specified clamp values for panels and brackets. Inspect threads and countersink surfaces during scheduled maintenance and replace any fasteners showing corrosion or wear. Use OEM-recommended hardware when available to ensure secure fitment and leak-free assemblies.
Real-World Applications
Part 556039 installs on reefer trailers, refrigerated trucks, and transport refrigeration assemblies where a flush, secure fastening is required—panels, mounting brackets, and component housings. Certified technicians fit this fastener during new builds, retrofit projects, and routine service to preserve temperature control and reliability. 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 the service department for confirmation.
Frequently Asked Questions
Q: Is this screw compatible with Thermo King Precedent units?
A: Yes. Part 556039 matches standard fastening points used in Thermo King Precedent installations when the specified thread and head style are required.
Q: What drive tool is required for installation?
A: A properly sized hex (Allen) key or bit is required to apply accurate torque and ensure a flush countersunk finish without damaging the head.
Q: Are corrosion-resistant options available for use in coastal or harsh environments?
A: Corrosion-resistant material and finish options are available to extend service life in demanding transport refrigeration conditions; specify material requirements at time of order.
Q: Can this part be used during routine fleet service without special adapters?
A: Yes. The 1/4-20 UNC thread and hex socket drive conform to common workshop tooling and maintenance workflows for rapid service.
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.