The M4 Spring Washer Square Section CR3 BZP is expertly designed to enhance fastening reliability. Crafted with precision, this washer offers superior tension maintenance, reducing the risk of loosening under vibration. Its square section and CR3 BZP finish provide excellent corrosion resistance, ensuring long-lasting performance in various applications. Ideal for both industrial and domestic use, this washer is a dependable choice for securing bolts and nuts, enhancing the durability and stability of your assemblies.