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. mmM16Length mm24.4MaterialCarbon SteelOuter Dia. mm24.0Pack Dimensions L x W x H mm78 x 64 x 56Pack Weight kg0.580Product CodeWSP16ZSize mmM16Thickness mm3.5Washer TypeSpringWidth mm7.