Production Process of Double Threaded Screws:
Double threaded screws are manufactured using precision machining techniques or cold forming processes, ensuring accurate dimensions and threading for both threads.
Characteristics:
Double threaded screws feature threads on both ends or along the length of the shaft, allowing for dual engagement and increased fastening strength. They offer enhanced stability and reliability in applications requiring secure fastening.For enhanced hardness and wear resistance, some double threaded screws undergo a carburizing process where the surface of the screw is enriched with carbon. This process improves the screw's durability and performance in demanding environments.
Appearance and Shape:
Double threaded screws typically have a cylindrical shaft with threads on both ends or along the length. They may have a variety of head shapes such as pan head, flat head, or round head, depending on the application requirements.
Materials:
Double threaded screws can be made from materials such as stainless steel, carbon steel, alloy steel, brass, or nickel. Material selection depends on factors such as strength, corrosion resistance, and environmental conditions.
Usage Areas:
Double threaded screws find applications in various industries including construction, woodworking, furniture assembly, headlight, and structural engineering. They are used for joining and fastening components together where increased stability and load-bearing capacity are required.
Surface Treatment:
Double threaded screws may undergo surface treatments such as zinc plating, hot-dip galvanizing, or passivation to enhance corrosion resistance and appearance. These treatments protect the screws from rust and corrosion, ensuring longevity in outdoor or harsh environments.
Salt Spray Test Duration:
Double threaded screws are subjected to salt spray testing to evaluate their corrosion resistance. Testing durations vary depending on the material and surface treatment, but typically range from several hours to hundreds of hours to ensure durability in corrosive environments.