External causes produce stainless steel screw locking phenomenon: the stainless steel bolts are not carefully cleaned off the production line or saved in the process, directly on the production line and cause the product to have a threaded locking phenomenon occurs scope of foreign body: mainly used for: environmental protection equipment, medical equipment, communications equipment, power facilities, electronic products, instruments, food machinery, petrochemical, ship assembly, valve piping, building walls, open-air occasions, sports facilities, outdoor decoration. People often think that magnets magnetic stainless steel, 304 stainless steel screws Zouping verify the authenticity of their advantages and disadvantages and, Dongying 304 stainless steel screws, do not attract non-magnetic 304 stainless steel screws, considered to be good, Boxing 304 stainless steel screws, genuine; suck by magnetic, it is considered counterfeit fakes. In fact, this is an extremely one-sided, no practical method to identify errors. Many types of stainless steel screws, according to the organizational structure at room temperature can be divided into several categories: 1. Austenitic: If 304,321,316,310, etc; 2. Martensite or ferrite: as 430,420,410 and the like; austenitic type is non-magnetic or weakly magnetic, martensite or ferrite is magnetic dip of 304 stainless steel screws, Jinan Road ground (Online ), 304 stainless steel 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.