1. Product Overview
This manual provides essential information for the Volkswagen Hexagon Collar Nut, part number N91021601. This genuine Volkswagen component is designed for secure fastening in various automotive applications, ensuring reliable performance and fitment within specified Volkswagen, Audi, and related vehicle models. It features a hexagonal head for wrench application and an integrated collar for improved load distribution and reduced loosening.
A close-up view of the Volkswagen Hexagon Collar Nut N91021601, showing its hexagonal shape, collar, and internal threading. The nut appears to have a greenish-grey coating, and a part of its original packaging box is visible in the background.
2. Specifications
The following table details the technical specifications of the Volkswagen Hexagon Collar Nut N91021601:
| Specification | Detail |
|---|---|
| Brand | Volkswagen |
| Model Number | N-910-216-01 |
| Material | Metal |
| Metal Type | Stainless Steel |
| Fastener Type | Hex |
| Inside Thread Size | M10 |
| Thread Type | Unified National Coarse (UNC) |
| Thread Style | Right Hand |
| Thread Class | Class 2B |
| Number of Pieces | 1 |
3. Installation Guidelines
Proper installation is crucial for the performance and safety of the fastener. Always refer to the specific vehicle service manual for detailed torque specifications and procedures.
- Preparation: Ensure mating threads are clean and free from debris, rust, or old threadlocker. Inspect both the bolt and the nut for any damage.
- Positioning: Place the component to be secured, ensuring proper alignment with the bolt.
- Initial Fastening: Thread the hexagon collar nut onto the bolt by hand to ensure it starts smoothly and without cross-threading.
- Torquing: Use an appropriate wrench or socket to tighten the nut. Apply the torque specified in the vehicle's service manual. Over-tightening can strip threads or damage components, while under-tightening can lead to loosening.
- Final Check: After torquing, visually inspect the installation to confirm the nut is seated correctly and the component is securely fastened.
4. Operation
The Volkswagen Hexagon Collar Nut N91021601 functions as a critical fastening component, designed to secure parts together by resisting loosening. The integrated collar provides a larger bearing surface, which helps distribute the load more evenly across the fastened material and can offer some resistance against vibration-induced loosening compared to standard nuts without collars. Once properly torqued, the nut maintains a clamping force to hold components in place.
5. Maintenance
Regular inspection of fasteners is part of general vehicle maintenance. While the nut itself requires minimal maintenance, its integrity is vital for overall system safety.
- Periodic Inspection: During routine vehicle checks or service, visually inspect the nut and surrounding components for signs of loosening, corrosion, or damage.
- Cleaning: If necessary, clean the nut and threads with a suitable automotive cleaner to remove dirt or grime. Avoid harsh chemicals that could degrade the material or coating.
- Replacement: If the nut shows signs of damage, stripped threads, or significant corrosion, it should be replaced immediately with a genuine Volkswagen part to ensure continued safety and performance. Fasteners that have been subjected to extreme stress or removed multiple times may also warrant replacement.
6. Troubleshooting
Common issues related to fasteners and their potential solutions:
- Nut Loosening: If a nut repeatedly loosens, verify that the correct torque specification was applied. Inspect for vibration sources, damaged threads on either the nut or bolt, or improper seating of the component. Consider using a thread-locking compound if appropriate for the application and approved by the manufacturer.
- Stripped Threads: If threads on the nut or bolt are stripped during installation, the affected fastener(s) must be replaced. Do not attempt to reuse stripped fasteners as they will not provide adequate clamping force.
- Corrosion: Significant corrosion can weaken the nut and make removal difficult. If corrosion is present, the nut should be replaced. Ensure proper anti-corrosion measures are in place for the application.
7. Warranty and Support
Specific warranty information for this individual component is typically provided at the point of purchase or through official Volkswagen channels. For detailed warranty terms, technical support, or assistance with part identification, please contact your authorized Volkswagen dealer or refer to the official Volkswagen service documentation.
Always ensure you are using genuine Volkswagen parts for optimal performance and safety.
