Why Choose Combination Screws? Features, Applications, and Benefits Explained
Introduction to Combination Screws
Combination screws consist of a screw, a spring washer, and a flat washer, which are fastened together through a threading process. Compared to standard screws, combination screws offer greater stability and convenience, eliminating the need for separate washer installation and improving production efficiency. They are widely used in railways, highway bridges, steel structures, and machinery requiring high-strength connections.
Types and Features of Combination Screws
Common types include pan head combination screws, external hex combination screws, internal hex combination screws, and square pressure line combination screws. Their key advantage lies in the integrated spring and flat washers, which enhance fastening strength and provide better mechanical stability. Unlike ordinary screws, combination screws have washers that cannot be removed after threading, making them more resistant to vibration and loosening.
Installation and Selection
Installation requires a specialized electric wrench to apply the correct torque for secure fastening. Some high-strength screws are not removable after installation, so selecting the right screw involves considering strength, thread pitch, and intended application. If additional anti-loosening properties are needed, using a screw with both a spring and flat washer is recommended.