5. Short-foot length is not less than the standard length minimum length, but not less than the minimum allowed length is called short feet. For example Yantai stainless steel anti-tooth nuts, water, gas delivery standards set forth in Jining stainless steel counter-tooth nut, allowing each batch of 10% (calculated according to the number) 2-4m long short-foot pipe. 4m length limit is not the length of the shortest allowable length is 2m. 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, cross stainless steel counter-tooth nut, round flat head, black-plated .Finish Code: Exterior handling specifications Head Code: head shape Screw Thread Code Type Drive Code: head sectional groove Liaocheng stainless steel anti-tooth nuts, feature type Length Code: Screw Length (mm) A-1: ??Thread Code: The screws metric screws directly to the screw outer diameter of the screw marked models, such as M3 namely 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, sometimes marked screws from the teeth as M3x0.5, M4x0.70, M5x0.8, M6x1. But because standards are not usually mentioned. Heze stainless steel counter-tooth crossbite nut nuts _ _ Jinan Road ground from Jinan Road ground Trading Limited. Jinan Daoqin Trading Company (www.daoqinshangmao.com) (www.daoqinshangmao.com) strong, credible, in Jinan, Shandong hardware accessories industry has accumulated a large number of loyal customers. The company better work attitude and constantly improving innovative ideas will lead Jinan Road ground into the brilliant and you work for a better future!