Purpose and quality of composite screws

Combination screws are used in a wide range of applications. The combined screw is provided with only one spring washer or one flat washer, or may be provided with only two assemblies of a spline. Such a combination screw is still strong when fixing the object, and the fixed object of the combination screw is not easy to fall off slowly due to vibration.

Combination screws are widely used and have been used in many countries around the world. Therefore, different countries will have different strength grading plans, but their materials are mainly steel and stainless steel. Combination screw is a special type of screw. Instead, there are still differences. The next step is to understand the purpose of the composite screws.

Use of combined screws

High strength large hexagon head bolts and combined screws for steel structures are mainly used in railway and highway Bridges, boiler steel structures, factories, high-rise civil buildings, tower structures, lifting machinery and steel structures that need friction type high strength steel structures. Strong bolt combination if screw. It features a bolt, and at the end of the bolt is called a dodecagonal. Special electric wrenches must be used for installation. There are two socket heads on top and bottom. One is mounted on the hexagon of the nut and the other on the decagonal of the hexagon outer screw. When tightening, apply a clockwise torque to the nut and an equal counterclockwise torque to the dodecagonal of the bolt so that the end of the hexagonal screw and the neck of the dodecagonal are torsional shears until the neck is shears. At this point, the installation ends. The torsional shear type high strength hexagonal screw is a disposable screw, which can not be removed after installation.

In general, the use of combined screws is widely used in electrical, electrical, mechanical, electronics, household appliances, furniture, ships and so on. But it says that different combinations of screws have different functions. For example, Phillips pan head combination screws are commonly used in small electronic products. Larger cross external hexagonal combination screws are used for larger electrical products such as inverters. For larger inverters, there are a number of cross hexagonal combination screws. Hit the converter housing. Loosen the tightening effect. For example, on the frequency converter, two combination screws with tines are used to destroy the paint, thus energizing all two combination screws on the chassis panel. There are also two sets of screws, such as square pressed screws, which are themselves two sets of screws with pan head screws and square pads. Usually used on terminal surfaces. The role is used for wiring, for crimping.