Combination screws, as the name implies, the screws will be used in combination, which refers to two fasteners will be combined together at least. Stable performance is better than the general screw, so it is often used in many occasions. Anzhikou Simple will take you to know the combination screws today:
There are also many types of combination screws, separated by head type and washer type. Generally, there are two types, one is three combination screws which is a screw with a spring washer and then a flat washer combination fastened together; The second is double combination screw, a screw only with a spring washer or flat washer composition.
Combination screws are mainly divided into pan head combination screws, outer hexagon head combination screws, and inner hexagon combination screws. The main feature of these combination screws is that they are equipped with the corresponding washer, which is very convenient to use. Its advantage is to save time, do not need manual to match the flat and spring washer, can make the production line convenient and fast operation, improve work efficiency.
Combination screws are mainly used in railway and road Bridges, boiler steel structure, industrial plants, high-rise civil buildings, lifting machinery and steel structure need to use friction type high strength bolt combination screws occasions.
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