(1) Square nuts: GB39 / DIN557 (2) Square thin nut: DIN562 (3) Square weld nuts: GB / T13680 / DIN928 (4) round nut: GB812 / DIN981 (5) hexagonal nut, A & B grade: GB6170 / 934 (6) slotted hex nuts: GB6178 / DIN935 (7) Hexagon weld nuts: GB / T13681 / DIN92910) (8) Hexagon thin nut: DIN936 (9) all-metal lock nut Type 1: GB6184 / DIN980 (10) all-metal locknut type 2: GB6185.1 / DIN6925 (11) hex head nylon lock nuts: GB889.1 / DIN982 (12) with a flange nylon lock nuts (13) of the cap nut: GB923 / DIN1587 ( 14) combined cap nut: GB802 / DIN917 (15) spherical cap nut (16) flange of the cap nut expansion bolt expansion bolts, is the pipeline branch / hanging / bracket or device fixed to the wall, floor on a special threaded connectors used in the column. Grade expansion bolts into 45,50,60,70,80, material mainly consists of austenite A1, A2, A4, martensitic and ferritic C1, C2, C4 Heze stainless steel micro screws, which represents methods such as A2 -70 Liaocheng stainless steel micro screws, "-", respectively before and after the bolt material and strength (1) bolting materials commonly used materials: Q215, Q235,25 and 45 miniature stainless steel screws Yantai, for important or special purpose threads. miniature stainless steel coupling screws, the choice of high mechanical properties steel 15Cr, 20Cr, 40Cr, 15MnVB, 30CrMrSi like. (2) The allowable stress of screw fasteners allowable stress and load properties (static, variable load), is coupled tightened preload control, and the need for material, structure, size and other factors relating to the threaded coupling. Jining stainless steel micro screws, Jinan Road ground (online consultation), stainless steel micro screws 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.