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Help CenterTek Screws for Metal Roofing C1022A Carbon Steel Hex Head With EPDM Washer Dacromet High Hardness Full Sizes Available
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About Our Tek Screws for Metal Roofing
Since 2020, Hefei SENOTECH New Materials Co., Ltd has been dedicated to supplying high-quality fasteners for global construction projects. Our C1022A Carbon Steel Hex Head Tek Screws with EPDM Washer are engineered specifically for metal roofing applications, combining extreme hardness, corrosion resistance, and reliable sealing. With an annual export value of US$1–1.5 million and markets spanning North America, South America, Europe, and Asia, we deliver products that meet the rigorous demands of professional contractors and builders. These screws are designed to drill through steel up to 12 gauge without pre-drilling, saving time and labor while ensuring a secure, leak-proof fastening.
Key Features & Technical Specifications
- Material: C1022A carbon steel – heat-treated for high hardness (≥ 450 HV) to penetrate thick metal substrates.
- Head Design: Hex head with deep drive recess (Phillips or square drive available) for powerful torque transfer without stripping.
- Integrated Washer: EPDM rubber washer bonded to the underside – provides a watertight seal against rain and moisture, preventing leaks around the fastener.
- Coating: Dacromet (zinc flake) finish – offers superior corrosion resistance compared to standard zinc plating, ideal for outdoor and marine environments.
- Size Range: Full sizes available from #12 x 1" up to #14 x 6", with custom lengths upon request.
- Self-Drilling Point: Sharp drill point (like a twist drill) eliminates the need for pilot holes, reducing installation time by up to 50%.
| Parameter | Value |
|---|---|
| Hardness (Core) | ≥ 450 HV |
| Drill Capacity | Up to 12 gauge (0.1046") steel |
| Coating Thickness | 8–12 μm (Dacromet) |
| Temperature Range | -40°C to +120°C (EPDM washer) |
| Pull-Out Load | ≥ 1,500 lbs (depending on size) |
Benefits for Your Projects
Using these Tek screws means faster installation, fewer callbacks, and longer roof life. The self-drilling tip reduces bit changes and pre-drilling steps. The EPDM washer expands and contracts with temperature changes, maintaining a seal for decades. The high-hardness core resists snapping under tough driving conditions, and the Dacromet coating exceeds 500 hours of salt spray resistance (ASTM B117). Whether you are installing standing seam panels, corrugated roof sheets, or insulated metal panels, these screws are a reliable choice.
Trust & Reliability from Hefei SENOTECH
Hefei SENOTECH New Materials Co., Ltd has been a trusted trading partner since 2020, exporting to 10+ international markets with an annual export value of US$1–1.5 million. Our screws undergo strict quality control: hardness testing, coating thickness measurement, and sealing performance checks. We offer full-size availability and customized packaging (bulk, small boxes, or private label). Our team provides prompt technical support and fast shipping. Contact us today to request a sample or a bulk price list – we are ready to support your next metal roofing project.
Frequently Asked Questions (FAQ)
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Q: Can I use these screws for wood-to-metal connections?
A: They are optimized for metal-to-metal (steel to steel) applications. For wood-to-metal, consider using a different point style. -
Q: How do I ensure the EPDM washer does not crack?
A: Our EPDM is formulated for UV and ozone resistance; it withstands outdoor exposure without cracking for years. -
Q: Do you offer a Phillips drive option?
A: Yes, both Phillips and square drive are available upon request. Please specify when ordering. -
Q: What is the minimum order quantity (MOQ)?
A: MOQ is 10,000 pieces per size, but we can discuss smaller trial orders for first-time buyers. -
Q: How long does shipping take?
A: Typically 15–25 days after payment, depending on quantity and destination. Express shipping is available for samples. -
Q: Are these screws compatible with a cordless drill?
A: Yes, a standard hex bit holder works. We recommend using a drill with clutch setting to avoid over-torquing. -
Q: Can I get a free sample for testing?
A: We offer free samples for qualified buyers (you pay shipping). Contact us for details.
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