VG1246070028 Genuine SINOTRUK Stay Bolt - Grade 10.9 Heavy-Duty Fastener for HOWO ZZ3257 Chassis

‌VG1246070028 Stay Bolt – SINOTRUK Chassis Reinforcement Anchor‌

‌The Structural Integrity Guardian‌
This ‌OEM SINOTRUK stay bolt‌ (Part# VG1246070028) withstands 1,040MPa tensile stress in HOWO dump truck suspension systems. Its rolled threads achieve 30% higher fatigue life than cut threads, proven in 3-year field tests with overloaded 60-ton mining configurations.

‌Engineering Superiority‌

• ‌Material‌: 38CrSi alloy steel, quenched & tempered
• ‌Surface Treatment‌: Dacromet coating (8-12μm) with 1,000hr salt spray resistance
• ‌Thread Type‌: M16×2.0-6g precision rolled threads
• ‌Locking Feature‌: Prevailing torque nylon patch (5-15Nm breakout torque)

‌Technical Specifications‌

‌Durability Features‌
✔ Microbead blasted finish for paint adhesion
✔ Chamfered thread entry prevents cross-threading
✔ Lot-traceable heat treatment batch numbers
✔ Matches OE pre-load elongation requirements

‌Compatibility‌: Direct replacement for ZZ3257 models with reinforced rear axles.

‌Installation Alert‌: Always use calibrated torque wrench - overtightening compromises fatigue resistance.