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.
Drywall screws are not priced by quantity alone. Weight per piece has a direct effect on cost, especially for large orders. A small difference in screw weight can change the total tonnage and the final price.
Send us the details, drawing on my factory-floor experience, we can analyze your specific market conditions and store requirements to help you determine the most precise and appropriate pricing.e-no guesswork on weight.
Please specify:
01
- Diameter × length
- Head type (bugle head, countersunk, etc.)
02
- Thread type (fine or coarse)
- Coating (black phosphate, gray phosphate, zinc, etc.)
03
- Target weight per piece (g/pc)
- Order quantity
04
- Packaging (dimensions of the box/outer carton, package weight, and whether the logo style or color can be customized)
Product：Grey Ruspert Plated Self-Drilling Screw
Pls note:We support sample-based data confirmation. Before mass production, we also send free samples so you can check consistency first-then we talk price. The aim is simple: a product that fits your market plan exactly.
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.
01
Heat Treatment
Precision-controlled quenching and tempering ensure consistent hardness (core hardness 560–720 HV) for reliable drilling performance.
02
Thread Rolling
Advanced thread rolling machines produce precise, burr-free threads for consistent engagement and vibration resistance.
03
Quality Control
100% laser sorting for dimensional accuracy; salt spray testing and torque testing performed in-house.
04
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)
Custom Packaging&Private Label Available
Choose from bulk cartons, poly bags with branded labels, or retail-ready packaging. Minimum order quantities can be adjusted to support both small contractors and large-scale procurement needs.
We offer custom box/bags printing and labeling services to help you build your own product line.
FAQ
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