Stainless steel screws rust corrosion properties better, there is a strong carry corrosion, Yantai 316 internal tooth washers, high temperature performance, also has a strong anti-rust properties. But in the harsh environment still will rust. For example, stainless steel screws in very humid conditions, wind and sun cream every day, 316 inner teeth washer, wind and rain. Long time friends, how many students will certainly point rust. In the example, and some of the acid-base chemical exposure, to produce a chemical reaction. Cause corrosion rust. There is the original bad stainless steel screws, washers internal teeth 316 Weihai, such products made of stainless steel SUS201 screws on the water used, often because the soaking time, had SUS201 stainless steel screws itself is not at all suitable salt of the sea Use strong above. Cause corrosion rust. Above sea products in use, it is generally recommended to use stainless steel screws SUS316 as 316 stainless steel screws corrosion properties carry more than a bit better. External causes produce stainless steel screw lock phenomenon: too much force or screwed too fast also prone to lockup. Operation should try to install bolts firmly and evenly. Force is too large or too fast too quickly to make stainless steel screw temperature rise caused by a bolt lock. Try not to use power tools to operate. Square neck bolts (1) round head square neck bolts: GB14 / DIN603 (2) less than half head square neck bolts: GB12 (3) low semi-circular head square neck bolts: GB801 Notes: square neck bolts carriage bolts and hex-head screws (1 ) hexagon socket head screws: GB70 / DIN912 (2) Hexagon socket set screws: BG70 / DIN913 (3) Hexagon tip set screws: within GB78 / DIN914 (4) countersunk head Socket Head tail set screws: GB79 Hexagon concave / DIN915 (5) within the set screws: Hexagon thin head screws DIN7991 (7) inside:: GB80 / DIN916 (6) hex head screws DIN7984 (8) a Cypriot screws: ISO7379 Weifang inner teeth washer 316, Jinan Road ground (certified), 316 internal tooth washer 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 demand. Jinan Road ground in leadership with the staff warmly welcome all inquiries negotiations to create the Jinan Daoqin better future.