The LOCK NUT NYLON STAINLESS #4-40 (SKU: XLN440SS) features a nylon insert that provides superior locking capability, preventing loosening under vibration and stress. Made from high-quality stainless steel, this nut is resistant to corrosion and suitable for use in both automotive and industrial environments. It is designed for #4-40 threaded applications, ensuring a reliable fit and lasting performance. Perfect for securing components in various assemblies, this lock nut is essential for maintaining integrity in your projects.