Square neck bolts (1) round head square neck bolts: GB14 / DIN603 (2) less than half the head square neck bolts: GB12 (3) low round head square neck bolts: GB801 Notes: square neck bolts again carriage bolts hex screws (1 ) hexagon socket head screws: GB70 / DIN912 (2) Hexagon level set screws: BG70 / DIN913 (3) Hexagon tip set screws: within GB78 / DIN914 (4) countersunk head hex convex tail set screws: GB79 / DIN915 (5) within the hexagon socket set screws: hexagon thin head screws DIN7991 (7) within:: GB80 / DIN916 (6) hex head screws DIN7984 (8) Cypriot screws: ISO7379 raw stainless steel hex screws The main uses of austenitic SUS302, SUS304, SUS316, SUS316L and "low-nickel" 201 stainless steel fasteners and other Heze, Jinan Road ground is currently only 201,304,316 materials such as stainless steel hex screws in stock, other require processing and customized according to customer needs. But we do not advocate the user chooses to use 201 low-nickel stainless steel hex screws. Heze stainless steel standard parts, Jinan Road ground (certified), stainless steel fasteners provided by Jinan Daoqin Trading Company. Jinan Daoqin Trading Company (www.daoqinshangmao.com) (www.daoqinshangmao.com) Shandong Jinan, hardware accessories leader, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer needs. Jinan Road ground in leadership with the staff warmly welcome all inquiries negotiations to create Jinan Daoqin a better future. You can also access (www.daoqinshangmao.com/supply_details_41209060.html), for more information about the company.