Define folds Edit this paragraph fastener standards (DIN German standard, GB GB, ASME / IFI / ANSI American Standard, Q vapor standard, PEM standard, JB standard mechanical unit, EN European standard, ISO international standard, JIS Japanese standard 316 US standard bolt, HG CHEMICAL STANDARD Laiwu 316 American standard bolts, NFE French standard, UNI Italian version, BS British standard, other commonly used standards National standards folding Edit this paragraph GB / T 1237-2000 fastener labeling method GB / T 152.1-1988 Rivet fastener through holes. stainless steel screws, stainless steel bolts, stainless steel rivets .316 screws, the screws 304 GB / T 152.2-1988 fasteners countersunk head with sink holes GB / T 152.3-1988 fastener cylinder head with a sink hole GB / T 152.4-1988 fasteners hex head bolts and hexagon nuts sink holes GB / T 16823.1-1997 threaded fasteners Stress area and bearing area ③ special-purpose carbon steel, such as bridge steel, marine steel, Using essentially the representation of carbon structural steel, but steel last letter .2 additional representation purposes. quality carbon structural steel ① steel beginning of the two figures that the carbon content of steel Qingdao 316 American Standard bolted to the average the carbon content of the very few that, for example, the average carbon content of 0.45% steel, steel number "45", it is not a sequence number, it can not be read as 45 steel .② higher manganese content of high-quality carbon structural steel, manganese should be marked, for example, high-quality carbon structural steel 50Mn.③ boiling steel, semi-killed steel and special purpose shall be final particularly marked in the steel, for example, the average carbon content of 0.1% semi-killed steel, the steel as 10b. Weifang 316 ANSI bolt, Jinan Road ground (certified), American Standard bolt 316 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 needs. In Jinan Daoqin leadership with the staff warmly welcome all inquiries negotiations to create Jinan Daoqin better future.