Custom m2.2 carbon steel cross drive zinc plated machine screw for electronic equipment

Industry knowledge：

How to distinguish stainless steel 304 and stainless steel 316 screws.
Because the stainless steel screw with the naked eye to distinguish its model is very difficult, even in the screw industry for a long time technical personnel. Whether it is 304 stainless steel screw, 316 stainless steel screw or 302 stainless steel screw, it is difficult to distinguish with naked eye, because the surface color of stainless steel screw is almost the same. It can’t be distinguished. Some people say that the difference between stainless steel and carbon steel can be distinguished by magnets. This is also unreliable. The performance of stainless steel screws will also change after production. The stainless steel wire without magnetism will have magnetism after being produced into screws, which is inevitable in production. So we can’t tell the type of stainless steel screw by naked eye or simple magnet tool.