Common specifications and labeling folding Edit this paragraph A: metric screws B: US regulatory screw C: inch screws A: Metric Machine Screw: MetricEx: M3 x 6 - PPB: M3 machine screws, 6mm long Linyi stainless steel wood screws, stainless steel cross Yantai wood screws, flat head round, black-plated .Finish Code: Exterior handling specifications Head Code: head shape Screw Thread Code Type Drive Code: head sectional groove, characterized in Type Length Code: Screw Length (mm) A-1: Thread Code: Screw type Metric screw directly to the screw outer diameter of the screw marked models, such as M3 that is, an outer diameter of 3.00mm .; M4 screws screw outer diameter that is 4.00mm.Metric Thread Size x Pitch: Note: Metric screw at the rear of the screw type Liaocheng stainless steel wood screws, screw teeth from the sometimes marked as M3x0.5, M4x0.70, M5x0.8, M6x1 but because standards are not usually mention (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 & Level B: 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 stainless steel wood screws _ Jining Jinan Road ground (certified) _ stainless steel wood 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.