Enhance the security of your fastening applications with our External Tooth Lock Washer. Crafted from durable stainless steel with a sleek black oxide coating, this washer ensures reliable performance and corrosion resistance. Compliant with DIN 6797A standards, it features precise measurements, including an 8mm outside diameter and 4.3mm inside diameter. With a thickness of .5mm and designed for M4 hole sizes, it provides a snug and secure fit for your assemblies. Trust in this high-quality washer for optimal fastening results in metric systems.