Detailed product description: All type of screws: DIN933, ISO4017, DIN931, ISO4014, DIN609, DIN610, DIN561, DIN564, DIN571, etc.Dimension: M3, M4, M5, M6, M8, M10, M12, M14, M16, M18, M20, M22, M24, M27, M30, M33, M36, M39, M42, M45,etc. ( the maximum is: M100) Length: 4mm-10000mmMaterial: alloy steel, copper, carbon steel, nylon, A2 stainless steel/A4 stainless steel(304 stainless steel/316 stainless steel).Surface treatment:Natural, Clear zinc plated, Black oxide coating, Dacromet, Galvanized, Chrome plated, Nickel plated, etc.Shanghai Q&D Industrial Supply Inc. manufactures all type of fasteners: guaranteed quality, reasonable price, short lead time. Please contact us for detailed information including exact price, lead time and shipping method&freight.Contact information: Sales manager: Connie QuPhone: 86-21-39003727 ext. 8003Cell phone: 86-18964953970Fax: 86-21-39003726Address: No. 150-3, 5000 Nong, Baoqian Rd., Jiading District, Shanghai City, ChinaZip code: 201806