Description
Secure your commercial fleet wheel ends and ensure total wheel retention safety with the genuine ZF Commercial Vehicle Knurled Wheel Stud & Wheel Bolt. Engineered specifically for heavy-duty truck wheel hubs, drive axles, trailer drums, and passenger transit coaches, this OE-grade wheel bolt provides high clamping force and precise wheel alignment under extreme payloads. Stripped bolt threads, stretched shanks, rounded knurl teeth, or severe rust corrosion cause loose wheel nuts, dangerous wheel wobble, rim elongation, and catastrophic wheel separation during transport. This original ZF wheel stud solves those hazardous wheel-end failures directly. It features forged Grade 10.9 or 12.9 alloy steel, precision-rolled metric threads, deep knurled locking shoulders, and anti-corrosion surface coating to deliver maximum anti-rotation bite, uniform torque retention, and uncompromised fleet safety in demanding transport operations.
Technical Parameters
| Category | Specifications & Technical Details |
| Forged Grade 10.9 / 12.9 High-Tensile Alloy Steel | We hot-forge the bolt from high-strength chrome-molybdenum alloy steel, then apply deep quench and temper treatment. It delivers extremely high yield and tensile strength. As a result, it easily withstands the enormous shear force generated by heavy truck emergency braking and sharp cornering. |
| Precision Cold-Rolled Metric Threads | We form the threads through a cold rolling process, which avoids cutting stress concentration and produces extremely high surface finish. Therefore, the threads engage tightly with hub nuts and resist stripping or stretching through repeated assembly and disassembly. |
| Deep-Tooth Knurled Locking Shoulder | We machine high-hardness straight or cross knurl teeth into the bolt neck. After pressing into the hub disc bore, they grip the base material tightly. Consequently, they provide outstanding anti-rotation torque, preventing the bolt from spinning when an impact wrench removes the nut. |
| Geomet / Dacromet Anti-Corrosion Surface Finish | We apply multi-layer high-grade anti-corrosion coating to the surface. It delivers over 500 hours of salt spray protection. Moreover, it effectively resists rust seizure caused by road de-icing salt, muddy water, and high-pressure washing. |
| OEM Alignment Lead-In Pilot Tip | We design a smooth guide cone tip on the head. It provides precise centering guidance during fast hub and tire installation. Notably, it completely prevents cross-threading that could damage the threads. |
Applicable Car Brands & Models
Common warning symptoms include:
Stripped or Cross-Threaded Threads: Wheel nuts bind, turn unevenly, or fail to tighten to specified torque during tire service.
Visible Thread Stretch or Necking: The stud thread pitch looks visibly elongated or narrowed near the base due to over-torquing.
Spinning Stud in the Hub: The wheel stud rotates freely inside the hub hole when applying torque to the lug nut because of worn knurl teeth.
Heavy Rust or Cracks: Severe surface scaling, pitted rust, or hair-line cracks detected at the junction between the bolt head and shank.
Wheel stud failures stem from using uncalibrated impact wrenches (over-torquing), under-torquing leading to stud fatigue from cyclic bending, or pressing old worn knurls back into oversized hub holes without replacing damaged components.
While single stud replacement is possible, fleet mechanics strongly recommend inspecting adjacent studs. When one stud snaps from over-torquing or fatigue, neighboring studs often absorb excessive stress and suffer hidden thermal or structural strain. Replacing studs in complete hub sets ensures uniform clamping force.
Our 1-year warranty covers all material fatigue shearing, thread stripping under specified OEM torque, knurl spinning failure, premature surface rusting, and manufacturing defects under normal operating conditions. If a stud fails within 12 months, we provide prompt replacement or warranty processing upon inspection.
