Genuine SINOTRUK Q617B14 Hexagon Head Screw Plug - High-Pressure Engine Seal

This Genuine SINOTRUK Hexagon Head Screw Plug (Part Number: Q617B14) serves as a critical sealing component specifically designed for high-pressure applications in SINOTRUK heavy-duty truck engines. Manufactured from premium carbon steel through precision machining processes, this plug creates reliable, leak-proof seals in oil galleries, coolant passages, and hydraulic systems. The hexagonal head design allows for secure tightening with standard wrenches while the tapered threads ensure perfect sealing without additional washers or gaskets. With its electro-zinc plated surface treatment, this plug offers superior corrosion resistance and durability under extreme operating conditions. As an original SINOTRUK component, it guarantees exact fitment and maintains system integrity for optimal engine performance.

Technical Specifications:

• Part Number: Q617B14

• Type: Hexagon Head Screw Plug with Tapered Threads

• Thread Size: M14 x 1.5 mm (NPT equivalent)

• Head Size: 17 mm across flats

• Overall Height: 12 mm

• Material: Carbon Steel (Grade 4.8)

• Surface Treatment: Electro-Zinc Plated (5-8μm)

• Pressure Rating: 60 bar maximum

• Temperature Range: -30°C to +180°C

• Thread Type: Tapered (1:16 taper)

• Sealing Method: Metal-to-metal thread engagement

• OEM Standards: Meets SINOTRUK QC/T 29028-2021

• Compatibility: HOWO T7H, HOWO A7, Striver series with MC11 engines

• Warranty: 36 months or 400,000 km

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Installation Notes:

1. Clean the threaded port thoroughly using appropriate cleaning tools and compressed air

2. Inspect threads for damage or wear before installation - replace if any defects are found

3. Apply thread sealant specifically designed for tapered threads (e.g., Loctite 577)

4. Hand-tighten initially to ensure proper thread engagement without cross-threading

5. Tighten with a 17mm wrench to final position - typically 1.5-2 turns past hand-tight

6. Do not overtighten as this may cause thread damage or stress cracking

7. For critical applications, pressure test the system after installation

8. Replace plug if removed - never reuse tapered thread plugs in high-pressure systems

9. Check for leaks after first operational cycle and retighten if necessary

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