Secure your mechanical assemblies with these high-quality M8-1.25 nylon insert lock nuts. This 50-pack of metric coarse thread nuts features zinc plating for enhanced corrosion resistance and durability. The Class 8 rating indicates superior strength and load-bearing capabilities, making these nuts ideal for demanding applications. The integrated nylon insert provides excellent vibration resistance and prevents the nut from backing off under load - a crucial feature for machinery, automotive applications, and industrial equipment. These lock nuts are designed with standard M8 sizing and 1.25mm thread pitch, ensuring compatibility with corresponding metric fasteners. The zinc-plated finish not only protects against rust but also provides a clean, professional appearance. Each nut is precision-manufactured to meet strict dimensional tolerances, guaranteeing consistent performance and reliable assembly. Perfect for both maintenance repairs and new construction projects where secure fastening is essential.