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The Range£6.38Visit shop Unifix Grade 2 Unc Nylon Insert Nuts 7/8"-9 Bzp - Nipcs22 000 - Grey
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The Unifix Grade 2 UNC Nylon Insert Nuts are engineered for mechanics, construction professionals, and DIY enthusiasts who require a dependable, vibration-resistant fastening solution. These nuts utilize a specialized nylon insert to lock threads in place, preventing loosening over time and ensuring long-term structural integrity. While they offer excellent security for general and automotive applications, users should be aware that the nylon insert is generally intended for single-use applications, as its locking efficacy may decrease after being removed and re-installed multiple times.
| Colour | Silver |
|---|---|
| Model Part Number | 5014196221281 |
| Brand | Unifix |
While they can technically be removed, the nylon insert deforms upon first installation. For critical structural applications, it is highly recommended to replace them after removal.
No. The nylon insert can degrade or melt if exposed to high temperatures, making them unsuitable for exhaust systems or high-heat engine components.
Grade 2 is a standard classification of bolt and nut strength, suitable for most general-purpose fastening projects.
No, these nuts are designed specifically for UNC (Unified National Coarse) threads and will not fit or perform correctly with metric threads.
The nut is locked once the bolt threads have fully penetrated through the nylon collar. You should feel increased resistance during the final turns of installation.
Verify that you are using a UNC-threaded bolt; the resistance is often caused by the nylon insert, which is a normal part of the locking process.
Nylon insert nuts are designed to be single-use. If the nut spins freely without resistance, discard it and use a fresh nut to ensure proper locking.
Ensure the nut is properly aligned with the bolt at the start of installation to avoid cross-threading.
To ensure a secure fit, always ensure that your bolt threads are clean and free of debris. When installing, use a standard wrench or socket to drive the nut onto the bolt; you will feel increased resistance once the bolt encounters the nylon insert, which is normal. Compatibility is limited to UNC-threaded hardware; do not attempt to force these onto metric bolts as it will damage the threads. For maintenance, periodically check the torque on your fasteners in high-vibration settings. If you find the nut turns freely by hand during a routine inspection, it should be replaced with a new unit to ensure safety.
