Self-drilling screw with hex head | A2 | DIN 7504K
Self-drilling screws with hex head and flange in A2 stainless steel offer an excellent solution for both industrial and household projects. Manufactured from high-quality stainless steel, they guarantee durability and corrosion resistance. These self-drilling screws are made of A2 grade stainless steel, with a surface and core hardness of approximately 200 HV. Their self-drilling capability and torsional strength are comparable to those of stainless steel self-drilling screws (ISO3506-4). These properties make them suitable only for drilling and self-tapping in softer materials such as aluminum, drywall, and plastic (for self-drilling screws for harder materials like sheet metal, see FZB self-drilling screws). The screw's hex head ensures an easy grip and smooth installation. The drill point allows for drilling and tapping in one step, saving time and labor.
AREA OF APPLICATION
This self-drilling screw is used for assembly in metal, wood, and plastic. Ideal for both indoor and outdoor use thanks to its stainless properties. The benefits of using this screw include its ease of installation and long-lasting durability, which minimizes the need for future maintenance.
TECHNICAL SPECIFICATIONS
Product type: Sheet metal screw
Standard: DIN 7504-K
Quality: A2/AISI304
Material class: A2-70
Head shape: Hexagon
Drive type: Hex drive'
FREQUENTLY ASKED QUESTIONS (FAQ)
What characterizes a stainless steel self-drilling screw with hex head and flange (DIN 7504 K)?
DIN 7504 K in A2 steel combines rapid assembly with a wide, pressure-distributing screw head:
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Integrated flange: The flange under the hex head acts as a built-in washer. It distributes the clamping force over a larger area, prevents the screw from pulling through soft materials, and provides an extremely stable connection.
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Secure tool grip: The hex head provides optimal force transmission without the risk of the socket slipping, which facilitates use with both hand tools and power drivers.
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Time-saving drilling function: The drill point drills and taps in a single operation without the need for pre-drilling in approved materials.
What materials can pure A2 stainless steel self-drilling screws drill into?
A2 stainless steel self-drilling screws have a surface and core hardness of approximately 200 HV (equivalent to ISO 3506-4). This makes them excellent for specific, softer substrates:
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Intended for softer materials: Perfect for drilling and self-tapping in aluminum, plastic, drywall, and wood.
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Not for steel or iron sheet: Since A2 steel cannot be hardened in the same way as carbon steel, the drill point cannot drill into harder metals such as sheet steel or steel beams (for fastening into sheet steel, electro-galvanized FZB self-drilling screws or bimetal screws are recommended).
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Long-lasting corrosion protection: The A2 grade (AISI 304) provides excellent rust and weather protection for outdoor use, humid environments, and industrial assemblies in aluminum structures.
What should be kept in mind when installing A2 stainless steel self-drilling screws?
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Respect the material limitation: Use the screw only in intended materials (aluminum, plastic, board materials). Attempting to drill into sheet steel will cause the drill point to flatten immediately due to the hardness of the material.
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Use correct RPM and pressure: Drill at a medium RPM and with steady, firm pressure. Avoid excessive force that can damage the threads in softer substrates like aluminum.
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Prevent thread galling: When installing into aluminum or stainless steel components, a thin layer of lubricant or wax helps prevent the threads from seizing during tightening.