Thermo King Self-Locking Hex Nylock Nut 1/2-13 553686
Official OEM Thermo King parts catalog entry for the Thermo King Nut Hex Nylock 553686, 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 Hex Nylock 553686 delivers OEM-grade fastening for Thermo King refrigeration systems, ensuring vibration-resistant security for reefer trailers and transport refrigeration components. Engineered for reliability, this nylock hex nut supports uptime and predictable service intervals across fleets operating in West Texas and the Permian Basin.
This self-locking hex nut features a nylon insert that resists loosening under dynamic loads, preserving assembly integrity in temperature-controlled transport and mobile refrigeration applications.
- Self-Locking Nylon Insert – Maintains clamp force under vibration to prevent loosening and reduce unscheduled stops.
- 1/2-13 Thread Size – Matches standard 1/2 in, 13 TPI fasteners used on many Thermo King assemblies for a precise, secure fit.
- OEM Part Number 553686 – Ensures exact-fit replacement and compatibility with Thermo King components to preserve system integrity.
- Durable Metal Construction – Steel body with corrosion-resistant finish protects fastener life in road and refrigerated environments.
- Vibration Resistance – Designed to lower maintenance frequency and support fleet uptime across long-haul and regional routes.
- Compact, Lightweight Design – Adds minimal mass while delivering reliable fastening where weight and space matter.
Product Details
| Part Number | 553686 |
| Product Name | Thermo King Nut Hex Nylock 1/2-13 |
| Thread Size | 1/2-13 (1/2 inch, 13 TPI) |
| Type | Hex Nylock Nut (nylon insert, self-locking) |
| Material | Steel with corrosion-resistant finish |
| Compatibility | Thermo King transport refrigeration units, reefer trailers, Precedent S-610M, S-610DE, Smart Reefer SR-4 and related assemblies |
| Manufacturer | Thermo King (OEM) |
Efficiency & Sustainability
Secure fasteners contribute to efficient cooling and consistent temperature control by preventing component movement, eliminating air or refrigerant leaks, and supporting fuel-efficient operation. Proper OEM fastening supports the Smart Reefer SR-4 communication integrity and long-term system reliability, helping fleets meet operational and environmental goals.
Installation & Maintenance Tips
Install to Thermo King torque specifications and confirm nylon insert engagement on initial assembly. Inspect nylock nuts during scheduled maintenance intervals and replace any with visible wear. Use OEM-grade washers or locking hardware where Thermo King guidelines recommend to preserve clamping force and service life.
Real-World Applications
The Thermo King Nut Hex Nylock 553686 secures compressors, condenser mounts, refrigeration brackets, and controls on reefer trailers and refrigerated trucks. Fleets in Amarillo, Lubbock, Odessa, and across the Permian Basin rely on genuine Thermo King hardware to maintain temperature control, reduce downtime, and protect perishable cargo.
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, please contact us for warranty information or contact our service department for confirmation.
Frequently Asked Questions
Q: Is this nut compatible with Thermo King Precedent units?
A: Yes. Part 553686 is an OEM nylock hex nut sized 1/2-13 and fits Thermo King Precedent-series and many standard transport refrigeration assemblies when the matching bolt and torque specification are used.
Q: Can this nut withstand road vibration and shock?
A: Yes. The integrated nylon locking insert maintains clamp force under vibration and dynamic loads to reduce the risk of loosening in mobile refrigeration applications.
Q: Where should fleets source this component for fast replacement in West Texas?
A: West Texas Thermo King stocks genuine Thermo King parts and provides installation and service across Amarillo, Lubbock, Odessa, and the Permian Basin to minimize downtime.
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 Hex Nylock 553686, 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 Hex Nylock 553686 delivers OEM-grade fastening for Thermo King refrigeration systems, ensuring vibration-resistant security for reefer trailers and transport refrigeration components. Engineered for reliability, this nylock hex nut supports uptime and predictable service intervals across fleets operating in West Texas and the Permian Basin.
This self-locking hex nut features a nylon insert that resists loosening under dynamic loads, preserving assembly integrity in temperature-controlled transport and mobile refrigeration applications.
- Self-Locking Nylon Insert – Maintains clamp force under vibration to prevent loosening and reduce unscheduled stops.
- 1/2-13 Thread Size – Matches standard 1/2 in, 13 TPI fasteners used on many Thermo King assemblies for a precise, secure fit.
- OEM Part Number 553686 – Ensures exact-fit replacement and compatibility with Thermo King components to preserve system integrity.
- Durable Metal Construction – Steel body with corrosion-resistant finish protects fastener life in road and refrigerated environments.
- Vibration Resistance – Designed to lower maintenance frequency and support fleet uptime across long-haul and regional routes.
- Compact, Lightweight Design – Adds minimal mass while delivering reliable fastening where weight and space matter.
Product Details
| Part Number | 553686 |
| Product Name | Thermo King Nut Hex Nylock 1/2-13 |
| Thread Size | 1/2-13 (1/2 inch, 13 TPI) |
| Type | Hex Nylock Nut (nylon insert, self-locking) |
| Material | Steel with corrosion-resistant finish |
| Compatibility | Thermo King transport refrigeration units, reefer trailers, Precedent S-610M, S-610DE, Smart Reefer SR-4 and related assemblies |
| Manufacturer | Thermo King (OEM) |
Efficiency & Sustainability
Secure fasteners contribute to efficient cooling and consistent temperature control by preventing component movement, eliminating air or refrigerant leaks, and supporting fuel-efficient operation. Proper OEM fastening supports the Smart Reefer SR-4 communication integrity and long-term system reliability, helping fleets meet operational and environmental goals.
Installation & Maintenance Tips
Install to Thermo King torque specifications and confirm nylon insert engagement on initial assembly. Inspect nylock nuts during scheduled maintenance intervals and replace any with visible wear. Use OEM-grade washers or locking hardware where Thermo King guidelines recommend to preserve clamping force and service life.
Real-World Applications
The Thermo King Nut Hex Nylock 553686 secures compressors, condenser mounts, refrigeration brackets, and controls on reefer trailers and refrigerated trucks. Fleets in Amarillo, Lubbock, Odessa, and across the Permian Basin rely on genuine Thermo King hardware to maintain temperature control, reduce downtime, and protect perishable cargo.
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, please contact us for warranty information or contact our service department for confirmation.
Frequently Asked Questions
Q: Is this nut compatible with Thermo King Precedent units?
A: Yes. Part 553686 is an OEM nylock hex nut sized 1/2-13 and fits Thermo King Precedent-series and many standard transport refrigeration assemblies when the matching bolt and torque specification are used.
Q: Can this nut withstand road vibration and shock?
A: Yes. The integrated nylon locking insert maintains clamp force under vibration and dynamic loads to reduce the risk of loosening in mobile refrigeration applications.
Q: Where should fleets source this component for fast replacement in West Texas?
A: West Texas Thermo King stocks genuine Thermo King parts and provides installation and service across Amarillo, Lubbock, Odessa, and the Permian Basin to minimize downtime.
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.
