A square section spring washer designed to prevent the nut from loosening. Corrosion Rating1 - Clean, dry & low humidity environmentsDescriptionA square section spring washer designed to prevent the nut from loosening. DIN StandardDIN 7980FinishZinc & Clear Cr3Hole Dia. mmM8Length mm12.7MaterialCarbon SteelOuter Dia. mm12.5Pack Dimensions L x W x H mm62 x 48 x 32Pack Weight kg0.250Product CodeWSP8ZSize mmM8Thickness mm2.0Washer TypeSpringWidth mm4.