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Steel Self Drilling Screws Zinc Plated XC DIN 7504 ANSI B18.6.4
Steel Self Drilling Screws
,Zinc Plated Self Drilling Screws
,ANSI B18.6.4 Self Drilling Metal Screws
Made in China Self Drilling Screws Hot Selling XC DIN 7504 ANSI B18.6.4
Key attributes
Packaging and delivery
Self Drilling Screw -
Advantages
The DIN 7504K standard defines self-drilling screws featuring a hex flange head design, offering several key advantages for industrial and construction applications:
- Integrated Drilling Functionality: Eliminates the need for pilot holes by combining drilling and threading in one step, enabling rapid installation into materials like metal, wood, or hard plastics, thereby reducing labor time and costs 23.
- Superior Fastening Stability: The hex flange head provides exceptional clamping force and vibration resistance, ensuring a secure, tamper-proof connection in high-stress environments 12.
- Enhanced Durability and Corrosion Resistance: Manufactured from high-strength carbon steel or alloy materials (e.g., Grade 8.8) with surface treatments like zinc plating or Dacromet coating, delivering long-term protection against rust and environmental degradation 12.
- Broad Application Versatility: Optimized for diverse scenarios such as framing, roofing, and building construction, due to reliable performance across varying substrates and conditions 35.
- Standardized Performance and Reliability: Compliance with DIN 7504 ensures consistent dimensional accuracy and mechanical properties, guaranteeing high-quality outputs for industrial use
DIN 7504K – Technical Description & Applications
1. Definition & Standards
The DIN 7504K is a metric thread-rolling screw designed for self-tapping into pre-drilled holes in sheet metal, plastic, and light alloys. It features a pan head with a cross recess (Phillips drive) and is commonly used in fastening thin materials without requiring a pre-formed thread.
2. Key Features
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Head Type: Pan head (low-profile, rounded top).
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Drive Type: Cross recess (Phillips, typically PH or PZ).
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Thread Type: Self-tapping thread (forms mating thread during installation).
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Material: Steel (usually carbon steel or stainless steel A2/A4).
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Surface Treatment: Zinc-plated, galvanized, or phosphated for corrosion resistance.
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Standards Compliance: DIN 7504K (Germany), similar to ISO 7049 (international).
3. Mechanical Properties
| Property | Typical Value |
|---|---|
| Tensile Strength (MPa) | 500–1000 (depending on grade) |
| Hardness (HV) | 320–450 (case-hardened for thread durability) |
| Thread Pitch | Coarse thread (e.g., M3, M4, M5) |
4. Common Applications
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Sheet Metal Assembly: Used in electrical enclosures, HVAC ducts, and automotive panels.
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Plastic & Composite Materials: Fastens plastic housings, electronic casings, and lightweight structures.
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Furniture & Appliances: Secures thin metal sheets in cabinets, racks, and home appliances.
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Automotive Interiors: Used in dashboard assemblies, trim panels, and interior fittings.
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Electronics & Consumer Goods: Fastens PCB mounts, battery covers, and small mechanical assemblies.
5. Advantages
✔ Self-Tapping – Eliminates the need for pre-threaded holes, reducing assembly time.
✔ Pan Head Design – Provides a low-profile, smooth finish for aesthetic applications.
✔ Phillips Drive – Allows for easy installation with standard screwdrivers or power tools.
✔ Versatile Material Compatibility – Works well with steel, aluminum, plastic, and thin sheet metal.
6. Installation Guidelines
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Pre-drill a pilot hole (diameter slightly smaller than the screw’s minor diameter).
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Avoid overtightening (risk of stripping threads in soft materials).
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Use corrosion-resistant coatings (e.g., zinc or stainless steel) for outdoor/moisture-exposed applications.
7. Alternatives & Variants
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DIN 7985K – Similar pan-head screw but with machine thread (not self-tapping).
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ISO 7049 – International equivalent with slight dimensional differences.
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DIN 7981 – Countersunk head self-tapping screw for flush mounting.
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Common sizes: 3#-6.3 * 130mm-180mm (other metric sizes available upon request).
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