GB / T 3098.1-2000 Mechanical properties of fasteners, bolts screws and studs GB / T 3098.10-1993 manufacture of non-ferrous metal Mechanical properties of fasteners, screws, studs and nuts GB / T 3098.11-2002 mechanical fasteners performance self-drilling tapping screws GB / T 3098.12-1996 Mechanical properties of fasteners - Cone proof load test GB / T 3098.13-1996 Mechanical properties of fasteners bolts and screws Torsional test and torque nominal diameter 1 ~ 10mmGB / T 3098.14-2000 Mechanical properties of fasteners - Widening test on GB / T 3098.15-2000 Mechanical properties of fasteners stainless steel nuts stainless steel screws, stainless steel nuts, stainless steel rivets, stainless steel hexagonal screws Qingdao 316LU-bolt, stainless steel rivets Laiwu 316LU-bolt, stainless steel screws, Tai'an 316LU screw-bolt 304, 316 screws 4. Cutting Steel ① steel dubbed "Y", to distinguish high-quality carbon structural steel. ② the letter "Y" after the carbon content to the average carbon content of the few that, for example, the average carbon content of 0.3% of free cutting steel, the steel is "Y30". ③ higher manganese content, but also in the steel post marked "Mn", for example "Y40Mn". 304 stainless steel screw bolt Qingdao 316LU-bolt | Jinan Road ground (certified) | 316LU-bolt is 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 implement the scientific management, innovation and development, the principle of honesty and trustworthiness, and satisfy customer demand. Jinan Road ground in leadership with the staff warmly welcome all inquiries negotiations to create the Jinan Daoqin better future.