Flat washer 1) DIN125 / DIN9021 2) carton steel, Q235 3) EG, Yellow zinc coat ,HDG, Plain, ... :2000 The specification of Flat Waher:(1) Standard:DIN125, DIN9021(2) Material: carton steel, steel, low carton steel, Q235(3) Grade ... your requirements(4) Dimension: M6 to M64 ; 1/4'' ---2-1/2''(5) Surface treatment: hot dip galvanize, zinc plated, Black or plain(6 ...