Product details Product nameCarbon steel hex bolt Surface TreatmentDacromet/Black oxide /White zinc MaterialCarbon steel/SS ColorPlain/Black/white SizeM5-M20/customization for your drawing UsageBuilding/ industry/ machinery CertificateISO9001-2001 MOQ1000pcs delivery time2-3days after deposit Supply Ability500tons per Month packingBulk/carbon then wood Pallet or As clients requirement Payment termT/T ,30% deposit ,70% balance before shipment SampleSample is free JZis a manufacturer of all standard DIN, BS,JIS and ISO fasteners and other industrial parts with well-equipped testing facilities and strong technical force. With a wide range, good quality, reasonable prices and stylish designs, our products are extensively used in Mold, Electricity, Construction, Solar energy, Automotive, Machinery & Equipment and other industries. Instructions: The material is carbon steel, that is, iron. Also known as 12.9 hexagon socket screw, is the most commonly used in the series of high strength bolts :12.9 hexagon socket screw is generally used in the higher mechanical performance requirements of the occasion, the head with or without khoop, the surface of cyanidation blackening treatment, the product itself also has a certain anti-rust function, used in some export equipmentChina Hex Bolt website:http://www.jingzhaofastener.com/bolt/hex-bolt/