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Rackhams£4.18Visit shop Rackhams Metric Fine Pitch Hex Nyloc Nuts Steel Bzp Zinc Din 985 T-Type - 1 - M10 (10Mm) X 1.25P
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The Range£5.61Visit shop Unifix Class 6 Nylon Insert Nuts T Type Din 985 Bright Zinc Plated - M6 X 1.00 (Box Of 200) - Grey
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The Unifix Class 10 Nylon Insert Nuts (T Type DIN 985) are professional-grade fasteners designed for mechanics, engineers, and DIY enthusiasts who require secure, vibration-resistant connections. Featuring a high-strength Class 10 steel construction and a self-locking nylon insert, these nuts provide reliable hold in demanding environments; however, the nylon insert is typically intended for single-use applications and loses locking efficacy if frequently removed and reinstalled.
| Colour | Grey |
|---|---|
| Model Part Number | 1267751 |
| Brand | Unifix |
While they can technically be threaded back on, the nylon locking effect is significantly reduced after the first removal. It is recommended to use a new nut for critical applications.
No. The nylon insert will melt at high temperatures. These are intended for general mechanical applications away from extreme heat sources.
Yes, Class 10 signifies high-tensile strength, making these nuts suitable for high-stress loads that would exceed the capacity of standard grade 6 fasteners.
Generally, no. The nylon insert acts as a mechanical threadlocker. Adding liquid threadlocker is usually unnecessary and may be counterproductive.
DIN 985 is the German industrial standard that defines the dimensions, thread pitch, and quality requirements for prevailing torque-type hexagon nuts with nylon inserts.
This is normal. The nylon insert creates a tight interference fit; use a wrench to complete the installation.
Nylon insert nuts are designed for optimal performance on the first use. Replace with a new nut if the locking feature feels loose.
While zinc-plated, exposure to harsh chemicals or saltwater can cause oxidation. Ensure fasteners are kept dry and consider a stainless steel alternative for marine environments.
Installation requires standard metric wrenches or socket drivers matching the nut size. Ensure the bolt threads are clean and free of debris before threading the nut by hand until the nylon insert makes contact. Once contact is made, use a calibrated torque wrench to reach the manufacturer-specified tension for your specific application.
Compatibility is based on metric pitch and diameter. Always match the Class 10 rating of the nut with a bolt of equal or higher strength to prevent thread stripping. To maintain performance, avoid exposing these fasteners to extreme heat exceeding 120 degrees Celsius, as this can melt or deform the internal nylon locking element, rendering it ineffective.
