Carbon Steel Roofing Screws: Hex Socket Self-Drilling Fasteners with EPDM Gaskets
Price:
Negontiation
MOQ:
20000
Delivery Time:
7-25DAYS
Brand:
YB
Product Description
Carbon Steel Roofing Screws: Hex Socket Self-Drilling Fasteners with EPDM Gaskets
Product Overview
These DIN 7504K self-drilling screws are high-performance industrial fasteners featuring hexagonal washer heads and specialized drill points. Manufactured from Grade 410 stainless steel, these screws drill their own pilot holes, tap mating threads, and provide secure fastening in a single operation. Grade 410 martensitic stainless steel can be heat-treated for enhanced hardness, making it superior to 304 or 316 grades for metal-to-metal applications.
Core Features
- Exceptional Hardness: Heat-treatable 410 grade steel penetrates carbon steel sheets and harder substrates without tip burnout
- Time-Saving Efficiency: Integrated drill point eliminates pre-drilling and hole alignment, reducing installation time and labor costs
- Corrosion Resistance: Reliable protection against atmospheric corrosion, water, and mild chemicals in humid environments
- High Torque Strength: Hexagonal head design ensures maximum torque transmission and prevents cam-out during power tool installation
- Integrated Sealing: Compatible with EPDM bonded washers for leak-proof seals in outdoor and roofing applications
Application Scenarios
- Steel construction and metal framing for industrial buildings
- Roofing and cladding systems requiring weather resistance and structural integrity
- HVAC systems for securing ductwork and mounting equipment components
- Automotive and machinery assembly lines with high-speed fastening requirements
- Solar energy systems for mounting panel brackets to aluminum or steel support rails
Technical Specifications
| 螺纹规格 | ST2.9 | ST3.5 | (ST3.9) | ST4.2 | ST4.8 | (ST5.5) | ST6.3 |
|---|---|---|---|---|---|---|---|
| P | 螺距 | 1.1 | 1.3 | 1.3 | 1.4 | 1.6 | 1.8 | 1.8 |
| a | max | 1.1 | 1.3 | 1.3 | 1.4 | 1.6 | 1.8 | 1.8 |
| c | min | 0.4 | 0.6 | 0.6 | 0.8 | 0.9 | 1 | 1 |
| dc | max | 6.3 | 8.3 | 8.3 | 8.8 | 10.5 | 11 | 13.5 |
| min | 5.8 | 7.6 | 7.6 | 8.1 | 9.8 | 10 | 12.2 |
| e | min | 4.28 | 5.96 | 5.96 | 7.59 | 8.71 | 8.71 | 10.95 |
| k | max | 2.8 | 3.4 | 3.4 | 4.1 | 4.3 | 5.4 | 5.9 |
| min | 2.5 | 3 | 3 | 3.6 | 3.8 | 4.8 | 5.3 |
| kw | min | 1.3 | 1.5 | 1.5 | 1.8 | 2.2 | 2.7 | 3.1 |
| r | max | 0.4 | 0.5 | 0.5 | 0.6 | 0.7 | 0.8 | 0.9 |
| s | max | 4 | 5.5 | 5.5 | 7 | 8 | 8 | 10 |
| min | 3.82 | 5.32 | 5.32 | 6.78 | 7.78 | 7.78 | 9.78 |
| dp | 2.3 | 2.8 | 3.1 | 3.6 | 4.1 | 4.8 | 5.8 |
| Drilling range | 0.7~1.9 | 0.7~2.25 | 0.7~2.4 | 1.75~3 | 1.75~4.4 | 1.75~5.25 | 2~6 |
Packaging Options
Carton Packaging: Bolts are packed in neutral packaging boxes with standard quantities arranged in small cartons. Exact unit counts are confirmed with customers, and customized configurations are available.
Outer Carton Box Packaging: Small cartons are consolidated into larger master cartons for secure transportation and storage. Quantities can be customized based on client specifications.
Pallet Packaging: Palletized units are securely wrapped with waterproof film and reinforced with packaging straps. Customer-specific shipping marks ensure clear identification and compliance with logistics requirements.
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Get in Touch
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Company
NINGBO YONGBIAO FASTENER CO.,LTD
Location
No.1 Lufeng Industrial Park, Wuxiang Town, Yinzhou District, Ningbo City, Zhejiang, China
Contact Person
Amylin