A square section spring washer designed to prevent the nut from loosening. Plated in Trivalent Chromium (Cr3) Zinc"Hole Dia. mm - M16Length mm - 24.4Width mm - 7Thickness mm - 3.5Finish - Zinc & Clear Cr3Material - Carbon Steel Timco Spring Washers - Zinc (Size M16 - 100 Pieces) in Silver Size: 1000mm x 1000mm