Oversized metal roof screws are not just fasteners; they are engineered anchors designed to handle extreme uplift forces. By utilizing a larger diameter shank and an expanded EPDM washer system, our custom screws ensure a leak-proof seal even in high-stress environments. The semantic intent of "oversized" usually refers to repairs (re-roofing) or heavy-gauge industrial panels where standard #9 or #10 screws fail to provide sufficient grip.
Corrosion is the primary enemy of metal roofing. Our manufacturing process incorporates multi-layer ceramic coatings and mechanical galvanization that exceed 1,000-hour salt spray tests. This ensures that every screw supplied maintains its structural torque capacity for over 30 years, matching the lifespan of premium standing seam or corrugated metal roof systems.
From custom thread pitches to specialized point styles (Drill points vs. Type 17), we cater to specific substrate requirements—be it light-gauge steel, heavy structural beams, or timber decking. Our engineering team analyzes the shear strength and pull-out resistance needed for your specific climate zone, whether it’s hurricane-prone coasts or snow-heavy mountains.
As a leading supplier located in the industrial hub of Wenzhou, Zhejiang Jifeilong Instrument Technology Co., LTD. leverages a fully integrated ecosystem. This allows for rapid prototyping of custom oversized screws, reduced lead times, and competitive tier-1 pricing. Our proximity to major ports like Ningbo and Shanghai ensures efficient global logistics for high-volume orders.
Modern fastening demands precision that manual labor cannot match. Our factory utilizes high-speed cold heading and thread rolling machines that are fully automated. This ensures that even for "oversized" custom batches, the dimensional tolerance remains within microns, reducing installation failure rates at the job site.
We understand that global procurement requires strict adherence to localized standards. Our products are designed to meet ASTM C1513, DIN 7504, and AS3566 requirements. We provide complete material traceability reports (MTR) and compliance certificates, ensuring your project meets local building codes in the US, EU, or Australia.
Zhejiang Jifeilong Instrument Technology Co., LTD. (formerly Yueqing Feilong Instrument Factory) was established in September 1999 and is located at the Oujiang Port in Wenzhou City. It has complete production, processing, grinding and other departments. We mainly engage in the integrated manufacturing and sales of various electrical switches, shafts, plastic products, and hardware components. Our products are widely used in home appliances, solenoid valves, electronics, automobiles, filtration equipment and other fields. By implementing strict quality control in every production link, from raw material procurement to finished product delivery, the company has passed the ISO9001 certification.
The company constantly carries out system innovation, technological innovation and management innovation, and attaches great importance to introducing advanced manufacturing technologies and advanced production equipment in the industry. Through technological and equipment transformation, it has now achieved fully automated production capacity. And with strict management, high-quality products and excellent services, it has won the trust and support of over 100 enterprise customers in China. This has enabled Zhejiang Jifeilong Instrument Technology Co., Ltd. to establish a good reputation in the market. The company adheres to the unchanging tenet of "seeking truth from facts and quality first", strictly implements the latest national and international quality standards.
Upholding the enterprise spirit of "quality first, reputation supreme, people-oriented, and quality as the root", we are gradually expanding from the domestic market to the international market, striving to become a high-quality global supplier of components. We devote our light and heat to building a beautiful cause and forge ahead forever to create a monument of modern instrument technology industry!
Be Realistic And Quality First. Seeking truth from facts to ensure every component meets the highest industrial benchmarks.
Reputation Supreme, People-Oriented, Quality As The Root. Building a global legacy in instrument technology.
Operate With Integrity And Achieve Multi-Party Win-Win. Partnering for long-term industrial success.
In mature markets like North America and Europe, oversized metal roof screws are the primary choice for re-roofing projects. When original fasteners strip out or rust, oversized replacements (#12 or #14 diameters) provide a fresh bite into existing purlins, preventing the need for costly complete structural replacements.
The global trend toward renewable energy has placed new demands on fasteners. Solar racks attached to metal roofs require oversized screws with extremely high pull-out resistance to combat wind loads. Our custom-engineered screws are now being optimized with integrated gaskets for solar footings.
Future trends indicate a shift toward chrome-free coatings and recycled steel alloy screws. As a forward-thinking supplier, Jifeilong is investing in eco-friendly surface treatments that provide maximum protection without hazardous environmental runoff.
Oversized screws typically have a larger thread diameter than the standard fasteners used during original construction. For example, if a #10 screw was originally used, a #12 or #14 "Oversized" screw is used for repairs to ensure a tight fit in the existing hole.
We use high-grade EPDM (Ethylene Propylene Diene Monomer) washers vulcanized to a metal backing. This material remains flexible across extreme temperature ranges, maintaining a compression seal against the metal panel for decades.
Yes. We offer professional powder coating services to match any RAL or major metal panel manufacturer's color palette, ensuring the fasteners are visually seamless on high-end architectural facades.
Standard custom orders take approximately 15-25 days for production. Shipping depends on the destination; however, we offer express air freight for urgent project needs or sea freight for cost-effective bulk supply.
Zhejiang Jifeilong Instrument Technology Co., Ltd.
📍 Oujiang Port, Wenzhou City, Zhejiang Province, China
🌐 Strategic Goal: Providing precision foundations for global industry through innovation and excellence.
📞 Professional team available 24/7 for technical support and wholesale quotes.
Jifeilong
