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The Unifix Class 10 Nylon Insert Nuts are engineered for professional-grade fastening in demanding mechanical, automotive, and construction projects where structural integrity is paramount. These high-strength nuts feature a specialized nylon insert designed to prevent loosening from vibration, ensuring joints remain secure over time. While they offer exceptional reliability and corrosion resistance due to their bright zinc plated finish, users should note that they are specifically designed for M20 x 2.50 bolt sizes and are intended for single-use applications due to the deformation of the nylon locking collar during initial installation.
| Colour | Silver |
|---|---|
| Model Part Number | 1268052 |
| Brand | Unifix |
No, it is recommended to use new nuts each time they are removed, as the nylon locking insert loses its effectiveness after the initial installation.
Class 10 refers to the mechanical strength property of the nut, indicating it is designed to withstand high-stress loads in heavy-duty applications.
The bright zinc plated (BZP) finish provides a layer of protection against corrosion, making them suitable for many outdoor environments, though they should be protected from harsh, constant moisture.
These nuts are specifically designed for an M20 x 2.50 thread pitch; using them on a bolt with a different pitch will damage the threads.
The nylon insert acts as a locking mechanism that creates friction against the bolt threads, preventing the nut from vibrating loose over time.
Verify the thread pitch is exactly 2.50mm and ensure there is no paint or debris on the bolt threads.
The nylon locking insert is designed for single-use; replace with a new nut to restore vibration resistance.
For optimal performance, ensure your M20 bolts are clean and free of debris before installation. Use a calibrated torque wrench to tighten the nuts to the required specification, ensuring the nylon insert fully engages with the bolt threads. Because the nylon collar creates a deformation-based lock, these nuts should ideally be replaced with new ones if a joint is disassembled for maintenance. Store these fasteners in a dry environment to maintain the integrity of the bright zinc plated finish and prevent moisture-related oxidation prior to use.
