Hexagonal lengthening extra long with hard drilling screws, as defined by standards such as DIN7504K, are a type of self-drilling screw with a hexagonal head and an extended length designed for drilling into hard materials. These screws are engineered to provide a secure and durable connection in a variety of applications, especially where penetration into harder substrates is required.
Carbon Steel: Typically used for general applications.
Stainless Steel: For environments where corrosion resistance is required.
Alloy Steels: Used in applications requiring high strength or high temperature resistance.
Advantage:
S elf-Drilling Capability: The hardened drilling tip allows these screws to bore into materials without pre-drilling, saving time and effort.
Hexagonal Head: Provides a large bearing surface for better torque transfer during installation, reducing the risk of the tool slipping.
Extended Length: Designed for use in applications where extra length is needed to reach through multiple layers or into deeper substrates.
Hardened Material: Made from hardened steel, these screws offer increased durability and resistance to wear, suitable for tough materials.
Corrosion Resistance: Often treated with protective coatings like zinc plating, these screws resist rust and corrosion, making them suitable for outdoor use.
Scope of Application
Construction: Used in construction projects for securing materials like formwork, safety barriers, and drywall tracks to concrete or metal structures.
Metalworking: Ideal for attaching metal sheets or components in fabrication processes where a strong and secure connection is needed.
Automotive Industry: Employed in the automotive industry for assembling car interiors and exterior components.
Renovation and Repair: Effective for renovation and repair work where existing structures need to be reinforced or secured with a strong and reliable fastening solution.
Machinery and Equipment Assembly: Used in the assembly of machinery and equipment where a strong and durable fastening solution is required.
Without auxiliary processing, and can be drilled, tapped and locked directly on the setting materials and foundation material, greatly saving the construction time. They have high pulling force and maintenance force, and will not loosen for a long time after combination.
When to use tapping screws, when to use tapping and drilling screws?1. Tapping screws are used for the connection between thin metal plate (steel plate, saw plate, etc.). When connecting, first make the threaded bottom hole of the connecting piece, and then screw the tapping screw into the threaded bottom hole of the connecting piece. Due to the high hardness of the threaded surface of the tapping screw (≥45HRC), internal threads can be tapped into the threaded bottom hole of the connecting piece to form a connection.2. Self-drilling and tapping screw can be directly in the setting material, basic material drilling, tapping, locking one-time fast completion, can quickly automatic drilling and directly screw fixed; The construction efficiency of self-drilling and tapping screws is very high; It saves the construction time to the maximum extent, improves the construction efficiency and improves the economic benefits of the boss. Self-drilling and tapping screw riveted connector has strong binding force, high preload force and high stability of the connector.
