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Help CenterWholesale Price C1022A Carbon Steel Tek Screws Flat Head With EPDM Washer Dacromet Coated Fast Drilling Full Sizes Available
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Hefei SENOTECH New Materials Co., Ltd, a professional trading company established in 2020 with an annual export value of US$1–1.5 million, is proud to present our Wholesale Price C1022A Carbon Steel Tek Screws Flat Head with EPDM Washer Dacromet Coated Fast Drilling series. These screws are engineered for demanding applications where corrosion resistance, sealing performance, and high-speed installation are critical. Available in full sizes, they offer a cost-effective solution for metal roofing, steel cladding, and general construction projects. Our global supply chain ensures consistent quality and competitive pricing, making us a trusted partner for buyers across North America, South America, Europe, Africa, and beyond.
Each screw is manufactured from C1022A carbon steel, a material known for its excellent hardness and strength. The Dacromet coating provides superior protection against rust and corrosion, significantly extending the service life in harsh environments. The EPDM washer bonded to the flat head creates a watertight seal, preventing leaks around the fastener. The fast drilling point allows for quick penetration through metal up to 12 gauge without pre-drilling, saving time and labor costs.
Key Features & Technical Specifications
| Feature | Specification | Benefit |
| Material | C1022A Carbon Steel (Case Hardened) | High tensile strength, resists stripping and torque failure |
| Coating | Dacromet (Zinc-Aluminum Flake) | Excellent corrosion resistance, withstands 500+ hours salt spray test |
| Washer | EPDM Pre-assembled Rubber Washer | Watertight seal, UV resistant, flexible under temperature extremes |
| Head Type | Flat Head (Countersunk) | Flush finish, reduces wind uplift and aesthetic appeal |
| Drilling Speed | Fast Drilling (Self-Drilling Point #2 or #3) | Penetrates steel up to 12mm in one step, no pilot hole needed |
| Size Availability | Full Sizes: Diameters #10 to #14, Lengths 1" to 6" | Suitable for various material thicknesses and applications |
- Dacromet coating – Unlike ordinary zinc plating, Dacromet provides sacrificial protection without hydrogen embrittlement, making it ideal for high-stress fastening.
- EPDM rubber washer – Pre-assembled and bonded to the head, ensuring a permanent seal that resists water, oil, and weather aging.
- Fast drilling point – Reduces installation time by up to 50% compared to standard TEK screws, lowering labor costs.
- Flat head design – Countersunk profile allows for a smooth, flush surface, minimizing snagging and improving appearance.
- Full size range – From small diameters for light gauge metal to large diameters for heavy structural connections, all stocked for quick delivery.
Our screws meet the mechanical requirements for metal roofing and siding applications commonly used in commercial, industrial, and residential projects. The combination of C1022A steel and advanced coating ensures long-term durability even in coastal or industrial environments. We also offer custom packaging options (bulk, box, or retail-ready) to meet your specific inventory needs.
Why Choose Hefei SENOTECH for Your Fastener Supply?
Since our founding in 2020, we have built a solid reputation for reliable sourcing and on-time delivery. With an annual export value of US$1 million to US$1.5 million, we serve clients in over 15 countries across North America, South America, Europe, Africa, Oceania, and Asia. Our dedicated quality control team inspects every batch for dimensional accuracy, coating thickness, and washer adhesion. We understand the importance of consistent quality and competitive pricing – that’s why we work directly with ISO-certified factories to bring you factory-direct prices without compromising on performance.
Whether you need a container load of standard sizes or a customized specification, we can respond quickly. Our experienced sales team provides technical support, sample requests, and logistics coordination. We are committed to being your long-term partner in the fastener industry.
Contact us today for a quote, free samples, or more information about our C1022A Carbon Steel Tek Screws with EPDM Washer Dacromet Coated. We are ready to support your next project with reliable fasteners at wholesale prices.
Frequently Asked Questions (FAQ)
Q1: What is the difference between Dacromet coating and standard zinc plating?
A: Dacromet is a zinc-aluminum flake coating that provides superior corrosion resistance without hydrogen embrittlement. It can withstand over 500 hours in salt spray tests, while typical zinc plating offers only 50–100 hours. Dacromet is also more heat-resistant and environmentally friendly.
Q2: Can these screws be used for metal-to-metal or metal-to-wood applications?
A: Yes, they are designed primarily for metal-to-metal fastening (e.g., steel roof sheets to steel purlins). For wood applications, the fast drilling point may still work, but we recommend verifying the thickness and using appropriate length. Our sales team can advise based on your specific material combination.
Q3: Are the EPDM washers pre-assembled or do I need to add them separately?
A: The EPDM washers are pre-assembled onto the screws and bonded under the head. They are ready to use out of the box, ensuring a consistent seal every time.
Q4: What sizes are available for wholesale orders?
A: We offer a full range of diameters (e.g., #10, #12, #14) and lengths from 1 inch to 6 inches. Custom sizes are available upon request with minimum order quantity. Please contact us with your requirements.
Q5: Do you provide samples before bulk orders?
A: Yes, we offer free samples (limited quantity) for evaluation. You only need to cover the shipping cost. This allows you to test the performance and quality firsthand.
Q6: How do you ensure the quality of the screws?
A: We have a strict quality control process: incoming material inspection, in-process monitoring during production, and final random sampling per ANSI/ASME standards. We also test coating thickness, hardness, and washer adhesion regularly. If any defect is found, we replace the batch at no extra cost.
Q7: What is the typical lead time for bulk orders?
A: For standard sizes, lead time is 2–3 weeks after order confirmation. For custom sizes or special packaging, it may be 3–5 weeks. We always try to expedite urgent orders – please discuss with our sales team.
Q8: Can these screws be used with a standard impact driver?
A: Yes, they are compatible with standard hex drivers (1/4" hex shank) used in most electric or pneumatic impact drivers. We recommend using appropriate torque settings to avoid over-tightening.
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