Thermo King Zinc-Plated Hex Head Screw M8 x 1.25 SZN 555759

$6.15

Quantity:

Built for Performance: The Thermo King Screw HH M8 x 1.25 SZN delivers OEM-grade fastening for Thermo King refrigeration system assemblies, providing secure connections that support reliable temperature control and fleet uptime across transport refrigeration operations.

This zinc-plated hex head screw serves as a dependable fastening solution for reefer trailer and refrigerated truck hardware, engineered to maintain assembly integrity in demanding transit and distribution environments throughout West Texas and the Permian Basin.

Precise Threading – M8 x 1.25 metric thread ensures consistent engagement with Thermo King mounting points for secure, vibration-resistant fastening.
Hex Head Design – Standard hex head allows easy installation with common wrenches or sockets for rapid service and reduced downtime.
Zinc-Plated Finish (SZN) – Corrosion-resistant coating supports longevity in exposed chassis and refrigeration unit environments common to Amarillo and Lubbock routes.
OEM Fitment – Matches Thermo King assembly requirements to preserve sealing, alignment, and mechanical integrity of critical components.
Serviceability – Straightforward replacement during scheduled maintenance preserves temperature control precision and fleet reliability.
Fleet-Grade Reliability – Supports continuous operation in transport refrigeration applications, helping protect cargo quality and reduce service interruptions.

Product Details

Part Number	555759
Product Name	Screw HH M8 x 1.25 SZN
Thread Size	M8 × 1.25 mm
Head Type	Hex head (HH)
Finish	Zinc plated (SZN)
Material	Steel, zinc-plated
Typical Use	Fastening Thermo King refrigeration unit assemblies and reefer trailer hardware

Efficiency & Sustainability – Using OEM fasteners like the Screw HH M8 x 1.25 SZN preserves the mechanical integrity of transport refrigeration systems and helps maintain efficient, fuel-conscious cooling operation. Reliable fastening reduces the risk of service defects that lead to increased fuel use or cargo temperature excursions, supporting sustainability goals and CARB Evergreen compliance where applicable.

Installation & Maintenance Tips – Install with the correct hex socket or wrench and follow Thermo King torque specifications found in the service manual. Inspect fasteners during routine maintenance intervals and replace corroded hardware with OEM screws to maintain secure connections and system precision.

Real-World Applications – Commonly applied in reefer trailer mounts, refrigeration unit brackets, and component assemblies on refrigerated trucks and transport refrigeration systems. This screw supports secure installation of panels, brackets, and hardware that preserve temperature control and cargo integrity during long-haul and regional routes.

Available for installation and service in Amarillo, Lubbock, Odessa, and throughout West Texas.

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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: https://www.trailerservicesofwesttexas.com/contact.

Frequently Asked Questions

Q: Is this screw compatible with Thermo King refrigeration unit assemblies?
A: Yes. The Screw HH M8 x 1.25 SZN provides OEM-compatible fastening for Thermo King refrigeration unit and reefer trailer hardware when M8 × 1.25 fasteners are specified.

Q: What finish does the SZN designation indicate?
A: SZN indicates a zinc-plated finish that improves corrosion resistance in exterior and chassis applications common to transport refrigeration service.

Q: How does using OEM fasteners affect fleet uptime?
A: Installing OEM-grade screws preserves assembly integrity, reduces vibration-related loosening, and supports consistent temperature control—helping protect cargo and minimize unplanned maintenance.

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.

Precise Threading – M8 x 1.25 metric thread ensures consistent engagement with Thermo King mounting points for secure, vibration-resistant fastening.
Hex Head Design – Standard hex head allows easy installation with common wrenches or sockets for rapid service and reduced downtime.
Zinc-Plated Finish (SZN) – Corrosion-resistant coating supports longevity in exposed chassis and refrigeration unit environments common to Amarillo and Lubbock routes.
OEM Fitment – Matches Thermo King assembly requirements to preserve sealing, alignment, and mechanical integrity of critical components.
Serviceability – Straightforward replacement during scheduled maintenance preserves temperature control precision and fleet reliability.
Fleet-Grade Reliability – Supports continuous operation in transport refrigeration applications, helping protect cargo quality and reduce service interruptions.