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The Range£7.76Visit shop Unifix Class 6 Nylon Insert Nuts T Type Din 985 Bright Zinc Plated - M20 X 2.50 (Box Of 25) - Grey
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The Unifix Class 10 Fine Pitch Nylon Insert Nuts (T Type DIN 985) are professional-grade fasteners designed for mechanics, engineers, and DIY enthusiasts who require high-strength, vibration-resistant connections. Their primary benefit is the integrated nylon collar that prevents loosening under mechanical stress, though users should note that these are single-use components that should be replaced after removal to maintain their locking integrity.
| Colour | Silver |
|---|---|
| Model Part Number | 1267342 |
| Brand | Unifix |
It is generally recommended to replace them after removal, as the nylon insert deforms during the initial installation to create the lock.
Class 10 refers to the mechanical property class of the steel, indicating a higher tensile strength suitable for heavy-duty applications.
Standard wrenches or sockets are sufficient, though a torque wrench is recommended for accurate fastening.
They feature a protective finish, but for extreme weather or marine environments, additional corrosion prevention or stainless steel options might be preferred.
Fine pitch nuts are required if your bolts have a higher thread density; check your bolt specifications or measure threads per inch.
Verify that the bolt and nut thread pitch match exactly. Fine pitch nuts will not fit coarse pitch bolts.
The nylon insert may be damaged or the bolt threads are worn. Replace both the nut and verify the condition of the bolt threads.
For optimal performance, ensure that the mating bolt threads are clean and free of debris. Always use a calibrated torque wrench to achieve the manufacturer's specified clamping force. When installing, note that the nylon insert will provide resistance as it reaches the bolt threads; this is normal and indicates the locking mechanism is engaging. Avoid using these nuts in extremely high-heat environments, as excessive temperatures can degrade the nylon insert. Always replace the nut with a fresh one if it has been unthreaded, as the nylon ring will have lost its original grip after the first cycle.
