Bag of 20 19mm WNI Wheel Nut Indicators (WNI) are used extensively by the road haulage industry as a visual safety aid for enhanced fleet safety. WNIs clearly identify when a wheel nut has loosened allowing remedial action to be taken before a failure occurs.  Our WNIs are manufactured to the highest quality using impact co-polymer polypropylene, which gives excellent rigidity and high impact resistance. The melting point has been engineered to 120 °C, deforming when excessive heat is transferred from the wheel/hub. We can produce WNIs with a higher melting point upon request.
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