Thermo King Hex Washer Head Screw 1/4-20 Stainless Steel 556351
Official OEM Thermo King parts catalog entry for the Thermo King Screw-HWH 1/4-20 SSBO X, 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-HWH 1/4-20 SSBO X delivers OEM-grade fastening reliability for Thermo King refrigeration systems, ensuring secure assemblies across temperature-controlled fleets. This stainless steel hex washer head screw supports uptime and dependable temperature control in demanding reefer applications.
The Thermo King Screw-HWH 1/4-20 SSBO X fits Thermo King transport refrigeration installations where corrosion resistance and precise fastening matter. West Texas Thermo King, a certified Thermo King dealership, provides verified parts that support efficiency, precision, and long-term fleet ROI.
- OEM Thread Specification (1/4-20) – Ensures a standardized, reliable fit for machine screw applications across Thermo King assemblies and reefer trailer components.
- Hex Washer Head (HWH) – Distributes load and resists loosening for secure panel and component retention during vibration-prone transport refrigeration service.
- Stainless Steel Construction – Provides corrosion resistance for extended service life in refrigerated trucks, reefers, and exposed outdoor assemblies.
- High-Quality Fastening – Supports precision alignment and torque control to maintain temperature control integrity in Smart Reefer SR-4 and Precedent-series systems.
- OEM Compatibility – Engineered to meet Thermo King mechanical fastening standards for reliable installation and fleet uptime.
- Low-Maintenance – Reduces replacement frequency and contributes to predictable maintenance intervals for transport refrigeration fleets.
Product Details
| Part Number | 556351 |
| Product Name | Thermo King Screw-HWH 1/4-20 SSBO X |
| Thread Size | 1/4-20 (standard coarse thread) |
| Head Type | Hex Washer Head (HWH) |
| Material | Stainless steel (corrosion-resistant) |
| Compatibility | Thermo King refrigeration units including Smart Reefer SR-4, Precedent S-610M, S-610DE, and common reefer trailer applications |
Efficiency & Sustainability
The Thermo King Screw-HWH 1/4-20 SSBO X supports fuel-efficient cooling and precise temperature control by maintaining secure assemblies that prevent airflow or refrigerant pathway disturbances. Use of stainless steel fasteners reduces replacement frequency and material waste across fleet maintenance cycles. This component aligns with Thermo King systems that integrate Smart Reefer SR-4 telemetry and CARB Evergreen-compliant strategies for optimized transport refrigeration performance.
Installation & Maintenance Tips
Install using the correct torque for 1/4-20 machine screws and a compatible hex socket or wrench. Use OEM washers or specified hardware where applicable to ensure leak-free panels and vibration resistance. Inspect fasteners during scheduled service intervals and replace any showing signs of wear or corrosion to maintain temperature control reliability.
Real-World Applications
The Thermo King Screw-HWH 1/4-20 SSBO X secures panels, brackets, and assemblies on refrigerated trucks, reefer trailers, and transport refrigeration units. Technicians use this fastener in routine repairs and preventive maintenance for consistent temperature control in long-haul and local distribution fleets. Available for installation and service in Amarillo, Lubbock, Odessa, and throughout West Texas.
View all Thermo King PartsBacked 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: contact the service department for confirmation.
Frequently Asked Questions
Q: Is this screw compatible with Thermo King Precedent units?
A: Yes. The Thermo King Screw-HWH 1/4-20 SSBO X fits many Precedent-series assemblies and similar Thermo King refrigeration unit attachment points.
Q: What material is the fastener made from?
A: This part uses stainless steel construction for corrosion resistance and long service life in transport refrigeration environments.
Q: Can this fastener be used on reefers operating in the Permian Basin and West Texas environments?
A: Yes. The stainless steel hex washer head design supports use across harsh regional conditions found in Amarillo, Lubbock, Odessa, and the Permian Basin.
Q: Where can fleets obtain installation and parts support?
A: West Texas Thermo King, a certified dealership, provides parts verification, installation, and fleet support across the Southwest.
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-HWH 1/4-20 SSBO X, 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-HWH 1/4-20 SSBO X delivers OEM-grade fastening reliability for Thermo King refrigeration systems, ensuring secure assemblies across temperature-controlled fleets. This stainless steel hex washer head screw supports uptime and dependable temperature control in demanding reefer applications.
The Thermo King Screw-HWH 1/4-20 SSBO X fits Thermo King transport refrigeration installations where corrosion resistance and precise fastening matter. West Texas Thermo King, a certified Thermo King dealership, provides verified parts that support efficiency, precision, and long-term fleet ROI.
- OEM Thread Specification (1/4-20) – Ensures a standardized, reliable fit for machine screw applications across Thermo King assemblies and reefer trailer components.
- Hex Washer Head (HWH) – Distributes load and resists loosening for secure panel and component retention during vibration-prone transport refrigeration service.
- Stainless Steel Construction – Provides corrosion resistance for extended service life in refrigerated trucks, reefers, and exposed outdoor assemblies.
- High-Quality Fastening – Supports precision alignment and torque control to maintain temperature control integrity in Smart Reefer SR-4 and Precedent-series systems.
- OEM Compatibility – Engineered to meet Thermo King mechanical fastening standards for reliable installation and fleet uptime.
- Low-Maintenance – Reduces replacement frequency and contributes to predictable maintenance intervals for transport refrigeration fleets.
Product Details
| Part Number | 556351 |
| Product Name | Thermo King Screw-HWH 1/4-20 SSBO X |
| Thread Size | 1/4-20 (standard coarse thread) |
| Head Type | Hex Washer Head (HWH) |
| Material | Stainless steel (corrosion-resistant) |
| Compatibility | Thermo King refrigeration units including Smart Reefer SR-4, Precedent S-610M, S-610DE, and common reefer trailer applications |
Efficiency & Sustainability
The Thermo King Screw-HWH 1/4-20 SSBO X supports fuel-efficient cooling and precise temperature control by maintaining secure assemblies that prevent airflow or refrigerant pathway disturbances. Use of stainless steel fasteners reduces replacement frequency and material waste across fleet maintenance cycles. This component aligns with Thermo King systems that integrate Smart Reefer SR-4 telemetry and CARB Evergreen-compliant strategies for optimized transport refrigeration performance.
Installation & Maintenance Tips
Install using the correct torque for 1/4-20 machine screws and a compatible hex socket or wrench. Use OEM washers or specified hardware where applicable to ensure leak-free panels and vibration resistance. Inspect fasteners during scheduled service intervals and replace any showing signs of wear or corrosion to maintain temperature control reliability.
Real-World Applications
The Thermo King Screw-HWH 1/4-20 SSBO X secures panels, brackets, and assemblies on refrigerated trucks, reefer trailers, and transport refrigeration units. Technicians use this fastener in routine repairs and preventive maintenance for consistent temperature control in long-haul and local distribution fleets. Available for installation and service in Amarillo, Lubbock, Odessa, and throughout West Texas.
View all Thermo King PartsBacked 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: contact the service department for confirmation.
Frequently Asked Questions
Q: Is this screw compatible with Thermo King Precedent units?
A: Yes. The Thermo King Screw-HWH 1/4-20 SSBO X fits many Precedent-series assemblies and similar Thermo King refrigeration unit attachment points.
Q: What material is the fastener made from?
A: This part uses stainless steel construction for corrosion resistance and long service life in transport refrigeration environments.
Q: Can this fastener be used on reefers operating in the Permian Basin and West Texas environments?
A: Yes. The stainless steel hex washer head design supports use across harsh regional conditions found in Amarillo, Lubbock, Odessa, and the Permian Basin.
Q: Where can fleets obtain installation and parts support?
A: West Texas Thermo King, a certified dealership, provides parts verification, installation, and fleet support across the Southwest.
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.