WHEEL BOLT SINGLE

Wheel Bolt Single – 46644

The Wheel Bolt Single (Model 46644) is a precision‑engineered fastener designed for high‑performance automotive applications, particularly within the Mercedes‑Benz family of vehicles. This bolt delivers exceptional strength, durability, and reliability, ensuring that wheels remain securely attached under extreme driving conditions.

Key Technical Specifications

• Thread Size: M12 x 1.5 mm – a standard metric thread that matches the wheel hub interface on many luxury cars.
• Length: 20 mm (ball seat) or 61 mm (full stud) – available in both short and long variants to accommodate different wheel designs.
• Material: High‑strength steel with a protective coating that resists corrosion, rust, and wear.
• Hex Key Size: 17 mm – the bolt is engineered for use with standard 17 mm hex keys or socket wrenches.
• Ball Seat: Spherical head (ball seat) that provides a smooth, low‑profile mounting surface on alloy wheels.

Design Features and Engineering Excellence

The 46644 bolt incorporates several advanced design elements that set it apart from generic wheel studs:

1. Ball Seat Geometry: The spherical head distributes load evenly across the wheel rim, reducing stress concentrations and preventing deformation of lightweight alloy wheels.
2. Thread Profile: A fine‑threaded M12 x 1.5 design offers a high torque capacity while maintaining a compact form factor suitable for tight engine bays.
3. Corrosion Resistance: The bolt’s surface treatment—often a zinc or phosphating layer—provides long‑term protection against moisture, road salts, and environmental contaminants.
4. Heat Treatment: Post‑manufacturing heat treatment enhances tensile strength and fatigue resistance, ensuring the bolt can withstand repeated wheel changes and high rotational speeds.

Compatibility Overview

The Wheel Bolt Single (46644) is specifically engineered for a wide range of Mercedes‑Benz models. Its versatility makes it a go-to replacement part for:

• Class A Series: W124, S124, W210, and related chassis.
• Class C Series: W202, S202, W203, CL203, and derivatives.
• Class E Series: W168, W190, and the extended E‑class lineup.
• Special Editions: SL, SLK, CLK, Vaneo, and other luxury coupes or convertibles.

Because of its standardized M12 thread and universal key size, the bolt can be used on both front and rear wheel assemblies without modification. The 61 mm stud variant is ideal for alloy wheels that require a longer engagement length, while the 20 mm ball seat version suits steel rims or low‑profile applications.

Installation Guidelines

1. Preparation: Clean the wheel hub and bolt threads with an appropriate solvent to remove grease, dirt, and old thread locker residue.
2. Thread Locker Application: Apply a high‑strength thread locker (e.g., Loctite 242) to the bolt’s threaded portion before insertion. This prevents loosening due to vibration or thermal cycling.
3. Torque Sequence: Use a calibrated torque wrench and follow the manufacturer’s recommended sequence: first tighten to 20 Nm, then perform a cross‑pattern tightening to 40 Nm, ensuring even load distribution across all bolts.
4. Inspection: After installation, visually inspect each bolt for proper seating, absence of gaps, and correct torque. Replace any bolt that shows signs of damage or improper engagement.

Maintenance Tips

• Regularly check wheel bolts during routine maintenance intervals (e.g., every 10,000 km) to detect early signs of wear or loosening.
• Avoid using excessive force when removing bolts; instead, use a breaker bar and the correct key size to prevent stripping.
• Store spare bolts in a dry environment to preserve their corrosion‑resistant coating.

Why Choose the 46644 Wheel Bolt?

The combination of robust material, precise engineering, and proven compatibility makes the 46644 bolt an essential component for any vehicle that demands reliability and safety. Whether you are restoring a classic Mercedes‑Benz or maintaining a modern luxury sedan, this single wheel bolt delivers:

• Consistent Performance: Maintains wheel integrity under high speeds and heavy loads.
• Long-Term Durability: Resistant to corrosion, fatigue, and environmental stressors.
• Ease of Installation: Standardized dimensions simplify replacement and reduce labor time.
• Cost Efficiency: One bolt per wheel provides a straightforward solution without the need for complex assemblies.

Conclusion

The Wheel Bolt Single (Model 46644) exemplifies automotive fastening excellence. Its meticulous design, material quality, and universal fitment across numerous Mercedes‑Benz models make it a reliable choice for professionals and enthusiasts alike. By incorporating this bolt into your vehicle’s wheel assembly, you ensure that every drive is safe, secure, and engineered to the highest standards of performance.