Thinner than a Form A, used for clamping and spacing applications. Plated in Trivalent Chromium (Cr3) Zinc"Hole Dia. mm - M10Outer Dia. mm - N/AThickness mm - 1.25Finish - Zinc & Clear Cr3Material - Carbon Steel Timco Form B Washers - Zinc (Size M10 - 100 Pieces) in Clear Size: 1000mm x 1000mm