GB / T 16823.2-1997 General tightening for threaded fasteners GB / T 16823.3-1997 Test method for tightening threaded fasteners GB / T 16938-2008 Fasteners Bolts, screws, studs and nuts - General technical requirements GB 17464-1998 Connecting devices copper conductors with safety requirements GB screw-type and screwless-type clamping units / T 17645.511-2010 Industrial automation systems and integration - Parts library - Part 511: Mechanical systems and common parts: a fastener reference dictionary GB / T within 2670.1-2004 hexalobular pan head self-tapping screws. Stainless steel screws, stainless steel nuts, stainless steel disc spring, stainless steel studs Yantai 316LU-bolt, stainless steel U-bolts, stainless steel hose clamps, stainless steel gaskets, stainless steel screws, the screws 304, 316 bolts. Liaocheng 316LU-bolt stainless steel rivets, stainless steel pin. 3. Carbon tool steel ① steel dubbed "T", so as not to be confused with other types of steel. ② The numbers indicate the carbon content of steel, with an average carbon content of a few thousandths of representation. For example "T8" represents the average carbon content of 0.8%. ③ higher manganese content in the steel last marked "Mn" Heze 316LU-bolt, such as "T8Mn". ④ High quality carbon tool steel of phosphorus, sulfur 316LU-bolt, lower than the average high-quality carbon steel tool steel final endorsement letter "A", to distinguish, for example, "T8MnA". Stainless steel screws Weihai 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.