A wider outer diameter than a Form A & B. Used to increase the clamping area. Plated in Trivalent Chromium (Cr3) Zinc"Hole Dia. mm - M8Outer Dia. mm - N/AThickness mm - 1.6Finish - Zinc & Clear Cr3Material - Carbon Steel Timco Form C Washers - Zinc (Size M8 - 200 Pieces) in Silver Size: 1000mm x 1000mm