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Help CenterRuspert Coated Self Drilling Screws Flat Head With EPDM Washer Full Sizes for Industrial Construction
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Hefei SENOTECH New Materials Co., Ltd presents our premium Ruspert Coated Self Drilling Screws Flat Head with EPDM Washer, designed specifically for demanding industrial construction applications. These fasteners combine a robust self-drilling point with a durable Ruspert coating that offers exceptional corrosion resistance, even in harsh outdoor or chemical environments. The integrated EPDM rubber washer ensures a watertight seal, making them ideal for roofing, cladding, and metal building assembly. Available in full sizes, they provide a reliable and efficient fastening solution for engineers and contractors worldwide.
Our screws are engineered to save time on the job site by eliminating the need for pre-drilling, while the flat head design allows for a flush finish. The Ruspert coating, a specialized multi-layer metallic and organic coating, delivers superior anti-corrosion performance compared to standard zinc plating. Below are key technical specifications:
| Feature | Specification |
| Diameter Range | #8 (4.2mm) to 1/4" (6.3mm) or M4 to M6 |
| Length Range | 16mm to 150mm (customizable) |
| Coating Thickness | 8-15 μm (Ruspert layer) |
| Salt Spray Resistance | ≥ 1,000 hours (ASTM B117) |
| EPDM Washer Hardness | Shore A 60±5 |
| Tensile Strength | 800-1,000 MPa (depending on diameter) |
| Operating Temperature | -40°C to +120°C (washer) |
- Self-Drilling Point: Reduces installation steps – no pre-drilling required, saving labor and tool costs.
- Ruspert Coating: Provides outstanding protection against rust and chemicals, extending service life in marine, industrial, and agricultural environments.
- EPDM Washer: Creates a durable, weather-resistant seal that prevents water ingress and thermal bridging.
- Flat Head Design: Sits flush with the surface for a clean, professional finish – ideal for visible applications.
- Full Size Availability: We stock a comprehensive range of diameters and lengths to meet diverse project requirements, from light gauge metal to heavy structural steel.
- Reliable Thread Lock: Ensures consistent torque and vibration resistance during and after installation.
These screws deliver tangible benefits to industrial construction projects: faster assembly, reduced corrosion-related maintenance, and improved structural integrity. Whether you are fastening metal roofing panels, sandwich panels, or purlins, our Ruspert coated self-drilling screws provide a cost-effective, long-lasting solution.
Since 2020, Hefei SENOTECH New Materials Co., Ltd has been serving global markets including North America, South America, Europe, Southeast Asia, Africa, and Oceania. With an annual export value of US$1 million to US$1.5 million, we have built a reputation for quality and reliability. Our products undergo rigorous quality control testing to ensure consistent performance. We offer flexible packaging, customized sizes, and responsive customer support. Contact us today to discuss your bulk requirements or request samples – we are committed to providing fasteners that exceed your expectations.
Frequently Asked Questions
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Can these screws be used in stainless steel or aluminum?
Yes, the self-drilling point is designed to penetrate mild steel and aluminum up to 12 gauge (2.5mm) without pilot holes. For thicker materials, please consult our technical team for recommendations. -
What does the Ruspert coating add to standard screws?
The Ruspert coating is a multi-layer anticorrosion system that provides significantly higher salt spray resistance (≥1,000 hours) compared to standard zinc plating (typically 100-200 hours). It also offers better weather and UV resistance. -
Are these screws available in hex head or Phillips drive?
Yes, we offer both Phillips (PH2/PH3) and hex washer head (HW) drives. Our standard flat head screws come with Phillips drive, but hex drive options are available upon request. -
What sizes are considered "full sizes"?
We stock diameters #8, #10, #12, and 1/4" (as well as M4, M5, M6 metric) with lengths from 16mm to 150mm (1/2" to 6"). Custom lengths are available for bulk orders. -
Can the EPDM washer withstand high temperatures?
EPDM rubber is rated for continuous exposure from -40°C to +120°C. For applications above 120°C, we can supply silicone or metal-backed washers as alternatives. -
How do I install these screws properly?
Use a standard electric screwdriver or impact driver with a suitable bit. Apply steady pressure until the drill point penetrates the material, then drive until the washer forms a slight compression seal. Do not overtighten to avoid damaging the washer. -
Do you provide samples for testing?
Yes, sample packages are available at a nominal charge, which can be refunded on large orders. We encourage customers to test our screws in their specific conditions. -
What is the typical lead time for bulk orders?
For standard sizes, we ship within 7-15 days after order confirmation. Custom sizes or special coatings may require 20-30 days. We can expedite for urgent projects.
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