Thermo King Hex Stop Nut 1/4-28 Fine Thread 555688
Official OEM Thermo King parts catalog entry for the Thermo King Nut-HexStop 1/4-28 555688, 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 Nut-HexStop 1/4-28 555688 delivers OEM-grade fastening reliability for temperature-controlled fleets, ensuring secure connections and consistent service life in demanding transport refrigeration applications.
Product Overview
Thermo King Nut-HexStop 1/4-28 555688 is a hexagonal stop nut engineered for secure fastening in Thermo King refrigeration systems and transport refrigeration assemblies. With a fine 1/4-28 thread, this nut supports precision engagement and consistent torque control that fleets require to maintain uptime and temperature control across reefer trailer and refrigerated truck installations.
Key Features & Customer Benefits
- 1/4-28 Fine Thread – Enables precise fastening and consistent clamping force for temperature-critical assemblies.
- Hexagonal Form – Fits standard wrenches for fast, reliable installation and serviceability on the road.
- Stop Function – Provides vibration-resistant retention to reduce the chance of loosening in transport refrigeration environments.
- OEM Thermo King Part – Ensures compatibility and fitment with Thermo King refrigeration components and certified repair procedures.
- Fleet-Ready Reliability – Supports continuous temperature control and minimizes unplanned downtime for operators across West Texas and the Permian Basin.
Product Details
| Part Number | 555688 |
| Product Name | Thermo King Nut-HexStop 1/4-28 |
| Thread Size | 1/4-28 (fine thread) |
| Form | Hex stop nut |
| OEM Compatibility | Thermo King refrigeration units and transport refrigeration assemblies |
Efficiency & Sustainability
This OEM Thermo King fastening component supports efficient temperature control across Thermo King platforms, including Smart Reefer SR-4 and Diesel Direct Electric series, by maintaining secure mechanical connections that preserve refrigerant lines and sensor integrity. Reliable fastening reduces leak risks, lowers maintenance interventions, and helps fleets pursue fuel-efficient cooling and longer asset life in CARB Evergreen environments.
Installation & Maintenance Tips
Install with the correct torque specification and standard hand tools to ensure secure seating. Inspect fasteners during scheduled maintenance intervals and replace any nut that shows signs of wear or damage. Use OEM-recommended clamps and hardware where applicable to preserve system integrity and fleet uptime.
Real-World Applications
This Thermo King Nut-HexStop 1/4-28 555688 serves reefer trailers, refrigerated box trucks, rail transport refrigeration connections, and walk-in cooling assemblies where secure, vibration-resistant fastening preserves temperature control and component alignment. Fleet operators in Amarillo, Lubbock, Odessa, and throughout West Texas rely on OEM fasteners to keep cargo safe and schedules on time.
View all Thermo King PartsAvailable 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: Contact West Texas Thermo King.
Frequently Asked Questions
Q: Is this nut compatible with Thermo King Precedent and S-series units?
A: Yes. As an OEM Thermo King fastening component, the Nut-HexStop 1/4-28 555688 fits Thermo King refrigeration assemblies and supports reliable connections across Precedent and S-series applications when the specified thread and size match the assembly.
Q: What is the primary benefit of a HexStop design?
A: The hexagonal shape enables standard tool use for quick service, and the stop feature provides vibration-resistant retention to reduce loosening during transport refrigeration duty cycles.
Q: How often should fleet maintenance inspect these fasteners?
A: Inspect fasteners during routine scheduled maintenance intervals and whenever refrigerant lines or sensors undergo service to maintain system integrity and temperature control.
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 Nut-HexStop 1/4-28 555688, 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 Nut-HexStop 1/4-28 555688 delivers OEM-grade fastening reliability for temperature-controlled fleets, ensuring secure connections and consistent service life in demanding transport refrigeration applications.
Product Overview
Thermo King Nut-HexStop 1/4-28 555688 is a hexagonal stop nut engineered for secure fastening in Thermo King refrigeration systems and transport refrigeration assemblies. With a fine 1/4-28 thread, this nut supports precision engagement and consistent torque control that fleets require to maintain uptime and temperature control across reefer trailer and refrigerated truck installations.
Key Features & Customer Benefits
- 1/4-28 Fine Thread – Enables precise fastening and consistent clamping force for temperature-critical assemblies.
- Hexagonal Form – Fits standard wrenches for fast, reliable installation and serviceability on the road.
- Stop Function – Provides vibration-resistant retention to reduce the chance of loosening in transport refrigeration environments.
- OEM Thermo King Part – Ensures compatibility and fitment with Thermo King refrigeration components and certified repair procedures.
- Fleet-Ready Reliability – Supports continuous temperature control and minimizes unplanned downtime for operators across West Texas and the Permian Basin.
Product Details
| Part Number | 555688 |
| Product Name | Thermo King Nut-HexStop 1/4-28 |
| Thread Size | 1/4-28 (fine thread) |
| Form | Hex stop nut |
| OEM Compatibility | Thermo King refrigeration units and transport refrigeration assemblies |
Efficiency & Sustainability
This OEM Thermo King fastening component supports efficient temperature control across Thermo King platforms, including Smart Reefer SR-4 and Diesel Direct Electric series, by maintaining secure mechanical connections that preserve refrigerant lines and sensor integrity. Reliable fastening reduces leak risks, lowers maintenance interventions, and helps fleets pursue fuel-efficient cooling and longer asset life in CARB Evergreen environments.
Installation & Maintenance Tips
Install with the correct torque specification and standard hand tools to ensure secure seating. Inspect fasteners during scheduled maintenance intervals and replace any nut that shows signs of wear or damage. Use OEM-recommended clamps and hardware where applicable to preserve system integrity and fleet uptime.
Real-World Applications
This Thermo King Nut-HexStop 1/4-28 555688 serves reefer trailers, refrigerated box trucks, rail transport refrigeration connections, and walk-in cooling assemblies where secure, vibration-resistant fastening preserves temperature control and component alignment. Fleet operators in Amarillo, Lubbock, Odessa, and throughout West Texas rely on OEM fasteners to keep cargo safe and schedules on time.
View all Thermo King PartsAvailable 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: Contact West Texas Thermo King.
Frequently Asked Questions
Q: Is this nut compatible with Thermo King Precedent and S-series units?
A: Yes. As an OEM Thermo King fastening component, the Nut-HexStop 1/4-28 555688 fits Thermo King refrigeration assemblies and supports reliable connections across Precedent and S-series applications when the specified thread and size match the assembly.
Q: What is the primary benefit of a HexStop design?
A: The hexagonal shape enables standard tool use for quick service, and the stop feature provides vibration-resistant retention to reduce loosening during transport refrigeration duty cycles.
Q: How often should fleet maintenance inspect these fasteners?
A: Inspect fasteners during routine scheduled maintenance intervals and whenever refrigerant lines or sensors undergo service to maintain system integrity and temperature control.
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.