Genuine SINOTRUK Hex Socket Head Cap Screw Q218B0650 - High-Strength Precision Fastener

This Genuine SINOTRUK Hex Socket Head Cap Screw (Part Number: Q218B0650) is a precision-engineered fastener designed for high-stress applications in SINOTRUK heavy-duty trucks. Manufactured from alloy steel through cold forging process, this socket head screw provides exceptional tensile strength and reliable clamping force in confined spaces where conventional wrenches cannot operate. The deep hexagonal socket allows for higher torque application while the precision-rolled threads ensure perfect engagement in critical components such as engine assemblies, transmission systems, and braking components. With its black oxide coating, this screw offers superior corrosion resistance and reduced friction during installation, meeting original equipment specifications for durability and performance in demanding operating conditions

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Technical Specifications:

• Part Number: Q218B0650

• Type: Hex Socket Head Cap Screw

• Thread Size: M10 x 1.25 mm

• Length: 60 mm (under head measurement)

• Head Diameter: 16 mm

• Socket Size: 8 mm hex key

• Material: Alloy Steel Grade 12.9

• Surface Treatment: Black Oxide Finish

• Tensile Strength: 1220 MPa Minimum

• Proof Load: 970 MPa

• Torque Specification: 45-50 Nm (dry threads)

• Hardness: 39-44 HRC

• Temperature Range: -40°C to +135°C

• OEM Standards: Meets SINOTRUK engineering specifications

• Warranty: 24 months against material defects

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Installation Notes:

1. Ensure the threaded hole is clean and free from debris before installation

2. Use a quality hex key that fits snugly to prevent socket rounding

3. Apply appropriate anti-seize compound if specified for the application

4. Tighten gradually to recommended torque using calibrated torque wrench

5. For critical applications, use thread locking compound as specified in service manual

6. Avoid over-torquing as this may cause thread stripping or bolt failure

7. Replace screw if socket shows signs of wear or deformation

8. Do not reuse screws in critical safety applications

9. Check torque values after initial operation cycle for critical assemblies

10. Store in dry environment to prevent corrosion before installation