The Hummel 1.329.5000.50 Internal Serrated Washer has an M50x1,5 thread size, with a diameter of 71 mm and a height of 1.5 mm. It is internally serrated to facilitate tight connections onto smooth surfaces, such as stainless steel and aluminum. The washer can be used in applications that require tight connections, such as power utilities, electrical enclosures, agricultral equipment, and medical devices. The product is RoHS compliant, with a corrosion resistant finish for longer service life.