Thermo King Flat Head Socket Screw 1/4-20 UNC 556040
Official OEM Thermo King parts catalog entry for the Thermo King Screw FLHSOC 1/4-20 SBS 556040, 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 FLHSOC 1/4-20 SBS 556040 delivers OEM-grade fastening reliability for Thermo King refrigeration systems. Engineered to secure panels, brackets, and assemblies with a flush, countersunk profile, this fastener supports consistent temperature control and dependable uptime across transport refrigeration and reefer trailer applications.
Key Features & Customer Benefits
- 1/4-20 UNC Thread – Ensures standardized, secure engagement with Thermo King mounting hardware for reliable retention under vibration.
- Flat Head Socket Design – Provides a flush, countersunk finish to protect cargo and equipment from snagging and to maintain aerodynamic profiles on reefer trailers.
- Internal Hex Drive – Allows quick, precise installation and removal with common Allen tools to reduce service time during field repairs.
- OEM Specification – Manufactured to Thermo King fastening standards for repeatable fit and alignment, supporting consistent assembly performance.
- Corrosion-Resistant Finish – Supports long-term reliability in transport refrigeration environments exposed to weather and road conditions.
- Versatile Application – Works with a wide range of Thermo King units and components, helping fleets maintain uptime across mixed equipment.
Product Details
| Part Number | 556040 |
| Product Name | Thermo King Screw FLHSOC 1/4-20 SBS |
| Thread | 1/4-20 UNC (standard coarse thread) |
| Head Type | Flat head, countersunk with internal hex (socket) |
| Typical Use | Panel and component fastening in Thermo King transport refrigeration assemblies |
| Compatibility | Commonly used across Thermo King systems, including Precedent S-610M, S-610DE, Smart Reefer SR-4, and similar transport refrigeration models |
Efficiency & Sustainability
This Thermo King fastener supports efficient maintenance and long-term fleet performance by minimizing service time and reducing the need for repeated replacements. Proper fastening reduces air and thermal leaks in temperature-controlled units, contributing to fuel-efficient cooling and consistent temperature control on reefer trailers. Compatibility with Smart Reefer SR-4 and other modern controller platforms ensures alignment with current Thermo King service standards and environmental compliance strategies.
Installation & Maintenance Tips
Install using the correct hex driver to factory torque specifications to avoid head damage and ensure a flush finish. Inspect fasteners during scheduled preventive maintenance intervals and replace any that show thread wear or corrosion. Use OEM washers and locking hardware where specified to maintain secure fitment in high-vibration applications.
Real-World Applications
This screw secures access panels, control brackets, and mounting plates on refrigerated trucks and reefer trailers operating across long-haul and regional routes. Service technicians rely on this part for on-the-road repairs and scheduled maintenance on Thermo King refrigeration units in the field. 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 reliability 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: contact us.
Frequently Asked Questions
Q: Is this screw compatible with Thermo King Precedent units?
A: Yes. The 1/4-20 thread and flat head socket design provide a secure, flush fit for many Precedent-series components and related Thermo King assemblies.
Q: What tools are required for installation?
A: Use an appropriately sized internal hex (Allen) driver and follow recommended torque values to ensure proper seating without damaging the head or countersunk surface.
Q: How does this part support fleet uptime?
A: By providing an OEM-spec fastening solution that resists vibration loosening and minimizes air gaps, the fastener helps maintain consistent temperature control and reduces unscheduled service events.
Q: Can this fastener be used on refrigerated trailers operating in the Permian Basin and other West Texas conditions?
A: Yes. The part supports robust field performance in regional climates including Amarillo, Lubbock, Odessa, and the Permian Basin when installed per Thermo King guidelines.
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 FLHSOC 1/4-20 SBS 556040, 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 FLHSOC 1/4-20 SBS 556040 delivers OEM-grade fastening reliability for Thermo King refrigeration systems. Engineered to secure panels, brackets, and assemblies with a flush, countersunk profile, this fastener supports consistent temperature control and dependable uptime across transport refrigeration and reefer trailer applications.
Key Features & Customer Benefits
- 1/4-20 UNC Thread – Ensures standardized, secure engagement with Thermo King mounting hardware for reliable retention under vibration.
- Flat Head Socket Design – Provides a flush, countersunk finish to protect cargo and equipment from snagging and to maintain aerodynamic profiles on reefer trailers.
- Internal Hex Drive – Allows quick, precise installation and removal with common Allen tools to reduce service time during field repairs.
- OEM Specification – Manufactured to Thermo King fastening standards for repeatable fit and alignment, supporting consistent assembly performance.
- Corrosion-Resistant Finish – Supports long-term reliability in transport refrigeration environments exposed to weather and road conditions.
- Versatile Application – Works with a wide range of Thermo King units and components, helping fleets maintain uptime across mixed equipment.
Product Details
| Part Number | 556040 |
| Product Name | Thermo King Screw FLHSOC 1/4-20 SBS |
| Thread | 1/4-20 UNC (standard coarse thread) |
| Head Type | Flat head, countersunk with internal hex (socket) |
| Typical Use | Panel and component fastening in Thermo King transport refrigeration assemblies |
| Compatibility | Commonly used across Thermo King systems, including Precedent S-610M, S-610DE, Smart Reefer SR-4, and similar transport refrigeration models |
Efficiency & Sustainability
This Thermo King fastener supports efficient maintenance and long-term fleet performance by minimizing service time and reducing the need for repeated replacements. Proper fastening reduces air and thermal leaks in temperature-controlled units, contributing to fuel-efficient cooling and consistent temperature control on reefer trailers. Compatibility with Smart Reefer SR-4 and other modern controller platforms ensures alignment with current Thermo King service standards and environmental compliance strategies.
Installation & Maintenance Tips
Install using the correct hex driver to factory torque specifications to avoid head damage and ensure a flush finish. Inspect fasteners during scheduled preventive maintenance intervals and replace any that show thread wear or corrosion. Use OEM washers and locking hardware where specified to maintain secure fitment in high-vibration applications.
Real-World Applications
This screw secures access panels, control brackets, and mounting plates on refrigerated trucks and reefer trailers operating across long-haul and regional routes. Service technicians rely on this part for on-the-road repairs and scheduled maintenance on Thermo King refrigeration units in the field. 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 reliability 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: contact us.
Frequently Asked Questions
Q: Is this screw compatible with Thermo King Precedent units?
A: Yes. The 1/4-20 thread and flat head socket design provide a secure, flush fit for many Precedent-series components and related Thermo King assemblies.
Q: What tools are required for installation?
A: Use an appropriately sized internal hex (Allen) driver and follow recommended torque values to ensure proper seating without damaging the head or countersunk surface.
Q: How does this part support fleet uptime?
A: By providing an OEM-spec fastening solution that resists vibration loosening and minimizes air gaps, the fastener helps maintain consistent temperature control and reduces unscheduled service events.
Q: Can this fastener be used on refrigerated trailers operating in the Permian Basin and other West Texas conditions?
A: Yes. The part supports robust field performance in regional climates including Amarillo, Lubbock, Odessa, and the Permian Basin when installed per Thermo King guidelines.
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.