Nylon Insert Lock Nuts
Nylon Insert Lock Nuts, also known as Nyloc Nuts or anti-vibration lock nuts, are high-performance self-locking fasteners with a built-in nylon insert, featuring excellent vibration resistance and no need for additional locking components. Manufactured in compliance with DIN982, DIN985 and GB/T889.1 standards, they are made of carbon steel or stainless steel 304/316, paired with highly elastic PA66 nylon rings. The nylon insert creates lasting friction when threaded, effectively preventing loosening caused by vibration and impact, with an operating temperature range of -50°C to +120°C. Reusable and easy to install without washers, they are widely used in automotive, machinery and outdoor equipment. Available in sizes M3-M36 with zinc-plated or black oxide finishes for superior corrosion resistance, they are the ideal anti-loosening solution for high-vibration applications.
These DIN 985 lock nuts are hex nuts with a blue nylon ring set into the top face, so the bolt thread cuts its own path through the insert and stays gripped. That interference fit separates them from a plain nut: the nylon recovers elastically and keeps a prevailing torque on the thread even after the joint settles. As nylon insert lock nuts, they need no adhesive and no second nut, so assembly handles one part. The zinc plated nyloc nuts here cover M8 to M16 in a blue-white finish for indoor and covered outdoor work. Because the insert is nylon, temperature and chemicals set the limit rather than the steel. Coating, insert colour, marking and packing can be customized.
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