Hebei Kappa Metal Products Co., Ltd. is one of the most reliable manufacturers and suppliers of full thread gray coating sds self drilling screws with hex flange head in China. Welcome to buy bulk high quality full thread gray coating sds self drilling screws with hex flange head made in China here from our factory. If you have any enquiry about cooperation, please feel free to email us.
Specifications
|
Parameter |
Details |
|
Product type |
Hex Flange Self-Drilling Screw |
|
Material |
Carbon steel (grade 10.9 / 8.8 available) / Stainless steel optional |
|
Thread Type |
Self-drilling point (drill sizes #2, #3, #4, #5) |
|
Head Style |
Hex flange with serrated bearing surface |
|
Surface Finish |
Grey Ruspert plating |
|
Size Range |
Diameter: #6 – #14 (M3.5 – M6.3) / Length: 12mm – 150mm |
|
Standards |
DIN 7504 / ISO 15480 compliant |
Surface Treatment & Manufacturing Process
Ruspert Coating: A high-performance multi-layer plating (zinc + base coat + top coat) that provides 3–5 times higher corrosion resistance than standard zinc plating. Grey color offers a clean, professional appearance.
Heat Treatment: Precision-controlled quenching and tempering ensure consistent hardness (core hardness 560–720 HV) for reliable drilling performance.
Thread Rolling: Advanced thread rolling machines produce precise, burr-free threads for consistent engagement and vibration resistance.
Quality Control: 100% laser sorting for dimensional accuracy; salt spray testing and torque testing performed in-house.
Applications
Metal roofing and cladding
Steel structure assembly (steel-to-steel fastening)
Prefabricated buildings
Automotive and heavy equipment manufacturing
HVAC systems and electrical enclosures
Customer Pain Points Solved
No pre-drilling needed: Self-drilling point saves labor time and eliminates extra tooling.
Corrosion in harsh environments: Ruspert coating withstands salt spray, moisture, and temperature extremes – ideal for outdoor and coastal applications.
Loose connections: Serrated flange head acts as an integrated washer, preventing loosening from vibration.
Inconsistent quality: Factory-direct production with strict process control ensures uniform hardness, thread geometry, and plating thickness.
Custom Packaging
We offer flexible packaging solutions to match your workflow:
Small poly bags with labels
Custom-printed cartons with your logo
Bulk master cartons (kilo or piece count)
FAQ
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