External causes produce stainless steel screw locking phenomenon: the stainless steel bolts are not carefully cleaned off the production line or in the process of saving, Qingdao stainless steel bolt, used directly in the production line and cause the product to mechanical screw thread has a locking phenomenon occurs foreign matters (1) Slotted cheese head screws: GB65 / DIN84 (2) Slotted pan head screws: GB67 / DIN85 (3) Slotted countersunk head screws: GB68 / DIN963 (4) Slotted flat head screws (5) cross groove small pan head screws: GB823 (6) Cross recessed flat head screw (7) Cross recessed pan head screws: GB818 / DIN7985 (8) Cross recessed countersunk head screws: GB819 / DIN965 (9) Cross recessed head screws: GB820 / DIN966 In addition, Dongying stainless steel bolt, 304 stainless steel after cold working, organizational structure will be transformed to martensite, the greater the degree of cold deformation, Weihai stainless steel bolt, more martensite transformation, the greater the magnetic steel . Like a number of number of steel, stainless steel bolt, Φ76 pipe production, no significant magnetic induction, production Φ9.5 tube. Ling bending deformation of large magnetic induction obviously some production rectangular tube pipe due to deformation than large, especially Angular part, more intense magnetic distortion is more evident. To completely eliminate magnetic 304 above causes, it can be opened to restore stability austenite by high temperature solution treatment, thereby erasing magnetic. Zibo stainless steel bolt, Jinan Road ground (certified), stainless steel anchor bolts 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.