... .Size from M6to M48. 3.Surface.galvanized.plated copper DIN125A Plain washer 1.Grade: 4.8 2.Size: M3-M52 3.Finish ... screw nails according to German Standard, American Standard, British Standard, with surface treatments as customer's requirement, including galvanization(Blue Zinc ... to England, German, America, Middle East, Africa South America. The quality of our products can meet standards.Contact Me