The characteristics of non-standard screws are: drilling and tapping, locking can be completed at one time, and strong binding force. Save construction time and improve work efficiency . General angle steel, channel steel, iron plate and other metal materials are combined and installed ; automobile trunks, container boxes, shipbuilding, refrigeration equipment and other assembly projects.
Non-standard screws are indispensable industrial necessities in our daily life: such as very small screws used in cameras, glasses, clocks, electronics, etc .; general screws for televisions, electrical products, musical instruments, furniture, etc .; as for engineering, construction, and bridges Large screws and nuts are used ; transportation equipment, airplanes, trams, cars, etc. are used in combination with large and small screws. Screws have important tasks in industry. As long as there is industry on the earth, the function of screws will always be important.
