4. Cutting Steel ① steel dubbed "Y" Yantai stainless steel, as distinct from high-quality carbon structural steel. ② the letter "Y" after the carbon content to the average carbon content of the very few that Yantai stainless steel ring, 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 bolt GB / T 3099.2-2004 term blind rivet fasteners GB / T 3103.1-2002 Tolerances for fasteners - Bolts, screws, studs and nuts GB / T 3103.2-1982 tolerances for precision mechanical fasteners Yantai stainless steel rivets, screws and nuts GB / T 3103.3-2000 Tolerances for fasteners flat washer GB / T 3103.4-1992 Tolerances for fasteners bolted connections GB / T 3104-1982 fastener width edges of hexagon products GB / T 5267.1-2002 Fasteners plating layer stainless steel screws, stainless steel bolts, stainless steel nuts, stainless steel gasket, stainless steel double-headed screws, stainless steel hose clamps Yantai cotter pins, stainless steel adapter, stainless steel screws, stainless steel pin, stainless steel cotter pins, 304 screws, the screws 316, 316 stainless steel spacer rings Yantai, Jinan Road ground (certified), Yantai stainless steel 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.