Single Febi Bilstein Wheel Bolt (46703/38021)

Overview of the Single Febi Bilstein Wheel Bolt (46703/38021)

The Febi Bilstein Wheel Bolt, identified by the part numbers 46703 and 38021, is a high‑performance fastening solution designed for automotive wheel assemblies. It serves as the critical interface between the wheel hub and the wheel rim, ensuring secure attachment under dynamic driving conditions.

Key Design Features

• Material Composition: Crafted from premium alloy steel with a protective zinc coating to resist corrosion and extend service life.
• Thread Specification: Metric thread size of M12 × 1.5 mm, providing a robust grip on the wheel hub flange.
• Keyhole Design: The bolt features a keyhole head that allows for precise torque application using standard tools while preventing cross‑threading.
• Load Capacity: Rated to withstand high radial and lateral forces, making it suitable for both passenger cars and light commercial vehicles.
• Compatibility: Specifically engineered for Mercedes-Benz models such as the C‑Class (W204), A‑Class (W176), M‑Class (W164), and E‑Class (W212). It also fits a wide range of other OEMs that use the same hub dimensions.

Installation Guidelines

Proper installation is essential for safety and performance. Follow these steps:

1. Preparation: Clean the wheel hub flange and remove any debris or old fasteners.
2. Alignment: Position the bolt so that its head aligns with the keyhole slot on the wheel rim.
3. Tightening Sequence: Use a torque wrench set to the manufacturer’s recommended value (typically between 70–90 Nm). Tighten in a star pattern to distribute load evenly.
4. Inspection: After installation, visually inspect for any misalignment or cross‑threading. Reapply torque if necessary.

Maintenance and Longevity

The Febi Bilstein Wheel Bolt is designed for long‑term reliability. To maintain its integrity:

• Periodic Checks: Inspect bolts every 10,000 km or after any significant impact event.
• Avoid Over‑Torqueing: Excessive torque can strip threads; always adhere to specified limits.
• Corrosion Prevention: Keep the wheel assembly clean and dry. Apply anti‑rust spray if operating in harsh environments.

Performance Benefits

• Enhanced Safety: Secure attachment reduces the risk of wheel detachment during high‑speed maneuvers.
• Improved Handling: Consistent torque application maintains optimal wheel alignment, contributing to better steering response.
• Durability: The alloy steel construction resists fatigue and wear, extending the service interval between replacements.

Applications Across Vehicle Models

The bolt’s specifications make it a versatile choice for numerous vehicle platforms. Commonly used in:

• Mercedes-Benz C‑Class (W204)
• A‑Class (W176)
• M‑Class (W164)
• E‑Class (W212)
• Other OEMs with matching hub dimensions and thread pitch.

Technical Data Sheet Summary

Conclusion

The Single Febi Bilstein Wheel Bolt (46703/38021) exemplifies engineering precision and reliability. Its robust construction, precise thread geometry, and proven performance across a range of high‑quality vehicles make it an indispensable component for any wheel assembly that demands safety, durability, and consistent handling.