In general, electroplating of combination screws generally refers to iron combined screws for electroplating. Electroplating is divided into environmental protection and non-environmental protection. Commonly used combinations of screw plating color are environmental protection color zinc, environmental blue zinc, environmental protection white zinc, environmental nickel, red color, white zinc, white nickel and so on. The use of cross-slot combination screws, hexagonal combination bolts, and self-tapping combination screws is the same as that of the corresponding cross-slot screws, hex head bolts, and tapping screws. The main feature of these combination screws is that they are equipped with corresponding gaskets and are very convenient to use.
Screws
The overall combination screws are widely used in electrical, electrical, mechanical, electronic, household appliances, furniture, ships and so on. But the above said that different combinations of screws have different effects. For example, Phillips pan head combination screws are generally used on small electronic products. Larger cross-hexagon combination screws are used in larger electrical products, such as inverters. Larger drives have many cross-hexagonal combination screws. Hit the inverter chassis. To relax the fastening effect. For example, with two teeth combination screws, this is used in the frequency converter, the role is to break the paint, so that the two assembly screws on the chassis board are all powered. There are also four combination screws, for example, the square pressure line, which itself is a pan head screw with a quad screw. Generally used on the terminal in the surface. The role is for wiring, for crimping.
High-strength large hex head bolt combination screws for steel structures, mainly used for railway and highway bridges, boiler steel structures, industrial plants, high-rise civil buildings, tower truss structures, hoisting machinery and steel structures requiring the use of friction-type high-strength bolt combinations Screw occasions. It is characterized by a bolt, which is called a dodecahedron at the end of the bolt. When installing, special electric wrenches must be used. There are two socket heads on the upper and lower sides, one on the hexagonal body of the nut, and the other on the decagonal body of the external hex screw. When tightening, apply clockwise force to the nut and apply equal counterclockwise force to the bolt dowel to make the connection between the end of the hexagon screw and the dodecagonal body bear the torsion shear until the neck cuts. So far, the installation has ended. This kind of torsional shear type high-strength hexagon socket screw is a type-type screw that cannot be removed after installation.