Thermo King Captive Nut M6 Stainless Steel OEM 556997
Official OEM Thermo King parts catalog entry for the Nut-Captive M6 SS (Thermo King 556997), 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-Captive M6 SS (Part 556997) supports reliable assembly and maintenance in Thermo King refrigeration systems by securing panels and components without hardware loss. Engineered for transport refrigeration and temperature control applications, this captive nut helps maintain uptime across reefer trailers and transport refrigeration fleets.
Product Overview
The Thermo King Nut-Captive M6 SS provides a stainless steel, captive-thread solution for fastening panels, brackets, and service access points on refrigeration equipment. West Texas Thermo King, a certified Thermo King dealership, lists this OEM-style captive nut to help fleets in Amarillo, Lubbock, Odessa, and the Permian Basin keep units serviceable, precise, and fuel-efficient during operation.
Key Features & Customer Benefits
- Stainless Steel Construction – Resists corrosion in roadside, coastal, and high-humidity environments for extended service life.
- M6 Thread Size – Matches common metric fasteners used on Thermo King panels and access points for a precision fit.
- Captive Design – Remains attached to panels during service, preventing lost hardware and reducing maintenance time.
- OEM-Grade Fitment – Supports secure mounting and consistent torque application to protect gaskets and seals on refrigeration assemblies.
- Reduced Downtime – Simplifies field repairs and inspections to improve fleet uptime and operational reliability.
- Long-Term Reliability – Withstands vibration and thermal cycles common to diesel direct electric and Smart Reefer SR-4 operations.
Product Details
| Part Number | 556997 |
| Product Name | Nut-Captive M6 SS |
| Material | Stainless Steel (SS) |
| Thread Size | M6 |
| Application | Captive fastening for Thermo King refrigeration panels and hardware |
Efficiency & Sustainability
This captive fastener supports efficient maintenance workflows that reduce vehicle downtime and unnecessary part replacement. By enabling secure, repeatable assembly, the Nut-Captive M6 SS contributes to reliable temperature control and fuel-efficient cooling across Thermo King refrigeration units, including fleets using Smart Reefer SR-4 telemetry and Diesel Direct Electric systems. Durable stainless construction reduces waste associated with frequent replacements.
Installation & Maintenance Tips
Install with the correct M6 fastener and maintain recommended torque values to protect mounting surfaces and gaskets. Inspect captive nuts during scheduled service intervals and replace any fasteners showing wear or thread damage. Use OEM or OEM-equivalent hardware to preserve fit and sealing performance.
Real-World Applications
The Nut-Captive M6 SS fits reefer trailers, refrigerated trucks, and transport refrigeration assemblies where captive fastening improves serviceability — door panels, access hatches, control box mounts, and interior panels. Its corrosion resistance and captive retention make it ideal for fleets operating throughout West Texas, including Amarillo, Lubbock, Odessa, and the Permian Basin.
Available for installation and service in Amarillo, Lubbock, Odessa, and throughout West Texas.
View all Thermo King PartsCustomer Assurance
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 at https://www.trailerservicesofwesttexas.com/contact or speak with the service department for confirmation.
Frequently Asked Questions
Q: Is this captive nut compatible with Thermo King refrigeration units?
A: Yes. The Nut-Captive M6 SS is designed to provide captive fastening where M6 threads are specified on Thermo King refrigeration panels and hardware.
Q: How does the captive feature improve fleet maintenance?
A: The captive design holds the nut in place during service, preventing lost fasteners and speeding reassembly, which improves uptime and reduces service labor.
Q: What maintenance is required for this part?
A: Inspect for corrosion or thread wear during scheduled maintenance. Replace any fastener exhibiting damage and use correct torque values at reinstall to protect seals and mating components.
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 Nut-Captive M6 SS (Thermo King 556997), 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-Captive M6 SS (Part 556997) supports reliable assembly and maintenance in Thermo King refrigeration systems by securing panels and components without hardware loss. Engineered for transport refrigeration and temperature control applications, this captive nut helps maintain uptime across reefer trailers and transport refrigeration fleets.
Product Overview
The Thermo King Nut-Captive M6 SS provides a stainless steel, captive-thread solution for fastening panels, brackets, and service access points on refrigeration equipment. West Texas Thermo King, a certified Thermo King dealership, lists this OEM-style captive nut to help fleets in Amarillo, Lubbock, Odessa, and the Permian Basin keep units serviceable, precise, and fuel-efficient during operation.
Key Features & Customer Benefits
- Stainless Steel Construction – Resists corrosion in roadside, coastal, and high-humidity environments for extended service life.
- M6 Thread Size – Matches common metric fasteners used on Thermo King panels and access points for a precision fit.
- Captive Design – Remains attached to panels during service, preventing lost hardware and reducing maintenance time.
- OEM-Grade Fitment – Supports secure mounting and consistent torque application to protect gaskets and seals on refrigeration assemblies.
- Reduced Downtime – Simplifies field repairs and inspections to improve fleet uptime and operational reliability.
- Long-Term Reliability – Withstands vibration and thermal cycles common to diesel direct electric and Smart Reefer SR-4 operations.
Product Details
| Part Number | 556997 |
| Product Name | Nut-Captive M6 SS |
| Material | Stainless Steel (SS) |
| Thread Size | M6 |
| Application | Captive fastening for Thermo King refrigeration panels and hardware |
Efficiency & Sustainability
This captive fastener supports efficient maintenance workflows that reduce vehicle downtime and unnecessary part replacement. By enabling secure, repeatable assembly, the Nut-Captive M6 SS contributes to reliable temperature control and fuel-efficient cooling across Thermo King refrigeration units, including fleets using Smart Reefer SR-4 telemetry and Diesel Direct Electric systems. Durable stainless construction reduces waste associated with frequent replacements.
Installation & Maintenance Tips
Install with the correct M6 fastener and maintain recommended torque values to protect mounting surfaces and gaskets. Inspect captive nuts during scheduled service intervals and replace any fasteners showing wear or thread damage. Use OEM or OEM-equivalent hardware to preserve fit and sealing performance.
Real-World Applications
The Nut-Captive M6 SS fits reefer trailers, refrigerated trucks, and transport refrigeration assemblies where captive fastening improves serviceability — door panels, access hatches, control box mounts, and interior panels. Its corrosion resistance and captive retention make it ideal for fleets operating throughout West Texas, including Amarillo, Lubbock, Odessa, and the Permian Basin.
Available for installation and service in Amarillo, Lubbock, Odessa, and throughout West Texas.
View all Thermo King PartsCustomer Assurance
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 at https://www.trailerservicesofwesttexas.com/contact or speak with the service department for confirmation.
Frequently Asked Questions
Q: Is this captive nut compatible with Thermo King refrigeration units?
A: Yes. The Nut-Captive M6 SS is designed to provide captive fastening where M6 threads are specified on Thermo King refrigeration panels and hardware.
Q: How does the captive feature improve fleet maintenance?
A: The captive design holds the nut in place during service, preventing lost fasteners and speeding reassembly, which improves uptime and reduces service labor.
Q: What maintenance is required for this part?
A: Inspect for corrosion or thread wear during scheduled maintenance. Replace any fastener exhibiting damage and use correct torque values at reinstall to protect seals and mating components.
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.
