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The FG21032073744035/1 Rear Wheel Hub Bearing Lock Nut is a critical fastening component designed for SINOTRUK Homan heavy‑duty trucks. As a genuine Sinotruk Homan parts offering, this lock nut secures the rear wheel hub bearings with precise preload, ensuring safe, reliable axle operation under extreme loads. The FG21032073744035/1 lock nut is manufactured from high‑strength steel, precision‑threaded, and features a self‑locking design that resists loosening due to vibration and thermal cycling.
Rear Wheel Hub Bearing Lock Nut
Гайка ступицы заднего моста
Tuerca de fijación de rodamiento de cubo trasero
| Parameter | Specification |
|---|---|
| OEM Part Number | FG21032073744035/1 |
| Product Name | Rear Wheel Hub Bearing Lock Nut |
| Brand | SINOTRUK Homan (Genuine OEM) |
| Material | High‑strength carbon steel (10.9 grade) |
| Thread Size | M80 × 2.0 (metric fine) |
| Hexagon Size | 115 mm A/F |
| Overall Thickness | 25.0 mm ± 0.5 mm |
| Locking Type | Prevailing torque (with nylon insert) |
| Surface Finish | Zinc‑plated (12 µm) with clear chromate |
| Recommended Torque | 550 – 600 N·m |
| Weight | 1.25 kg ± 0.05 kg |
| Operating Temperature | -40 °C to +120 °C |
| Certification | ISO 9001, IATF 16949, CE |
The FG21032073744035/1 rear wheel hub bearing lock nut is designed to maintain precise preload on the wheel bearings, ensuring optimal bearing life and safe wheel retention. Its precision‑cut threads engage smoothly with the axle spindle, while the integrated nylon locking insert prevents loosening under severe vibration and shock loads.
This genuine SINOTRUK Homan part is manufactured from high‑grade steel, heat‑treated to achieve the required strength and ductility, and coated with a zinc‑plated finish to resist corrosion from road salt, moisture, and brake dust. The nut’s large hexagon design allows for secure tightening with standard socket tools, ensuring consistent clamp load during assembly.
Nylon insert provides consistent locking force, reusable for limited cycles.
Zinc‑plated finish resists rust and chemical attack.
Matches original SINOTRUK Homan specifications for thread and dimensions.
Grade 10.9 steel withstands heavy‑duty torque and axial loads.
FG21032073744035/1 lock nuts are subjected to extreme loads – always use genuine SINOTRUK Homan parts to ensure correct clamping force and prevent wheel hub bearing failure or wheel separation.
The FG21032073744035/1 lock nut plays a vital role in maintaining the correct bearing preload, which is essential for preventing premature bearing wear, excessive play, and overheating. Its nylon locking element provides a consistent friction torque that resists loosening from axle oscillation and braking forces, ensuring the bearing remains correctly positioned throughout the service interval.
Proper installation is critical: always clean the axle spindle threads and apply a thin coat of anti‑seize compound to prevent galling. Torque the nut to the specified value using a calibrated torque wrench, then rotate the hub to confirm smooth bearing rotation. If the nut is used with a cotter pin or tab washer, ensure it is properly engaged to provide secondary retention.
Regular inspection of the lock nut is recommended during brake and wheel service. Check for signs of thread damage, corrosion, or loosening. If the nylon insert shows signs of wear or loss of locking force, the FG21032073744035/1 nut should be replaced to maintain secure fastening.
The FG21032073744035/1 lock nut has been tested under extreme conditions, including heavy braking, high torque, and off‑road impacts, proving its reliability over long distances. It is the preferred choice for fleet operators who demand safety and durability in their axle systems.
When ordering the FG21032073744035/1 lock nut, always verify the thread size and pitch against your axle spindle. While designed for SINOTRUK Homan rear axles, compatibility with other Sinotruk models should be confirmed. Each nut is packaged with a new locking insert and, where applicable, a replacement cotter pin.
The FG21032073744035/1 lock nut is backed by a rigorous quality assurance program. Every nut is inspected for thread accuracy, hardness, and locking performance. By choosing this genuine part, you invest in the safe and reliable operation of your heavy‑duty truck’s wheel end.
If you have any questions about our products, services, or anything related to what we offer, please don’t hesitate to leave us a message—our dedicated team is always ready to provide prompt and helpful responses to address your concerns. What’s more, when you become our valued customer, we’re delighted to offer you complimentary catalog services, giving you access to detailed, up-to-date information on our full range of products, specifications, and offerings to help you make informed decisions.
We are a first-class heavy duty vehicles and spare parts supplier in China. which covers from engine, gearbox, cab, axle assemblies to main assembly accessories, electrical parts and other chassis parts like brake, clutch and steering parts.
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