We have our own surface treatment plant, and the thickness of zinc layer meets the standard requirements. We can make authoritative inspection reports, including surface treatment such as hot galvanizing, Dacromet, electro galvanizing, boiling black, etc.GB series, Q standard series, DIN German standard series, IFI American standard series, BS British standard series, JIS Japanese standard series, ISO international standard series, etc.The material comes from a high-quality steel manufacturer, which can issue an authoritative material inspection report, including Q235, 35 #, 45 #, 345B, 40Cr, 35CrmoA, stainless steel 201, 304 and other special materials.Poland, Russia, Algeria, Egypt, Ghana, Kuwait, the United Arab Emirates, Kazakhstan, Malaysia, Pakistan, the Philippines, South Korea, Myanmar, Thailand, Ukraine, Syria, India, the United States, Turkey, Brazil, Sri Lanka, Norway, etc.In addition to mechanical manufacturing, socket head cap screws can be applied to hardware products. Common electrical products, electronic products and mechanical equipment in life will use this kind of screw. The parts that have used the socket head cap screws can be used for the production and assembly of automobiles and ships, with a wide range of operations. Nowadays, hexagonal socket screws are involved in electronic and electrical appliances, electric power chemical industry, furniture manufacturing, water conservancy engineering and other fields.The hexagonal socket screws are mainly used in the manufacturing of mechanical products, with many advantages. In the process of use and installation, the hexagonal wrench is mainly used. The internal angle of the wrench is 90 degrees, one end is longer and the other end is shorter. It can save a lot of effort when screwing the screws, and it is also easy to install and remove the screws.The frequently used hexagon socket screws are mainly divided into the following categories: pan head hexagon socket screws, countersunk hexagon socket screws, and cylindrical head hexagon socket screws. The grooves of these screws are all hexagonal, but the screw heads have different shapes. The standard sizes of socket head cap screws are mainly divided into M3, M4, M5, M6, M8, M10, M12, M16, M20, M25, M30, etc. The coarse pitch and unit of screws of different specifications are basically different. Generally, the head diameter is represented by DK, the head thickness is k, and the diagonal edge and thread diameter have corresponding manifestations.