Cheng Hao supplies roofing screws to procurement teams, OEM brands and distributors serving international construction markets. Our products meet all of the dimensional and performance requirements of EN 14566 and EN 14592 standards, so they can be specified on European construction projects without additional qualification. We manufacture in high volume from our ISO 9001 certified facility in Taiwan and export regularly to Europe, North America, and globally.
All roofing screws are produced with Type 17 points for clean penetration through metal panels, timber, and composite roofing substrates. Standard hex head types are available with EPDM bonded washers, providing a watertight seal at the fastening point that meets typical weatherproofing requirements in all European specifications. Custom dimensions, coatings, and configurations are available, please check our specifications page for details.
We carry out rigorous inspections and provide all customers with inspection and testing certificates with all orders to guarantee the quality of all of our products. Tests include: mechanical performance, corrosion resistance, dimensional inspection, hardness and environmental testing.
All of our factories have specific quality control departments with all of the QC systems they need to ensure that every batch of products meets our high standards and all of this is also backed up by our in-house ISO certification.
Please check our screw specifications page to see the wide range of options we can supply or contact us now with your detailed requirements.
Choose based on the product’s intended use, application method, and customer requirements.
Commonly used types include SUS302, SUS304, SUS316, SUS410. A special type called NSSC550 is exclusive to Cheng Hao, which has high hardness, high corrosion resistance, and high acid resistance. Its rust prevention is 15 times better than existing materials for screws.
Low carbon steel, medium carbon steel, high carbon steel.
Refers to steel materials that, besides containing carbon, also have other alloying elements such as silicon, manganese, chromium, nickel, vanadium, molybdenum, etc.
Common material codes include 2011, 2024, 6061, 6082, 7075.
Brass (Yellow brass), Bronze.
Choose based on the product’s intended use, application method, and customer requirements.
Please view our commonly ordered screw types below or let us know your special requirements for custom screws.
These are some of the most frequently asked questions by our customers. We hope they are helpful to you. If you cannot find the answer you need, please contact us using the inquiry button below.
Yes. Our roofing screws are produced to the dimensional and performance requirements of EN 14566 and EN 14592, making them suitable for specification on European construction projects without additional qualification.
If your project requires documentation confirming compliance, we can provide this as part of the quotation process.
Yes. Our standard hex head roofing screws are available with EPDM bonded washers, which form a watertight seal at the fastening point. This makes them suitable for metal roofing applications where weatherproofing is a specification requirement.
If you need a specific washer size or Shore hardness, let us know when you request a quote.
Our roofing screws are tested using the neutral salt spray method (NSS) in accordance with ISO 9227. The standard product achieves a minimum of 500 hours before first signs of red rust, with higher-specification coatings available for coastal or high-humidity environments.
We can provide test reports on request. Confirm your target market and substrate type when inquiring so we can recommend the correct specification.
Every batch goes through dimensional inspection, hardness testing, drive and strip torque checks, and pull-out testing before it leaves our facility. For orders with specific performance requirements, we can arrange third-party inspection or provide full test documentation.
Our facility is ISO 9001 certified, and we are happy to share our standard inspection checklist during the sourcing process.
Yes. We produce OEM and private label roofing screws for distributors supplying international markets. You can specify head type, point geometry, thread form, coating, washer type, and packaging.
We will provide a sample for approval before production begins. Contact us with your product specification or an existing product you would like us to match.
Self-drilling screws have a drill-point tip that cuts through the substrate without a pilot hole, making them faster to install into steel and metal roofing. Self-tapping screws require a pre-drilled hole and are typically used in timber or lighter substrates.
We supply both types and can help you confirm the correct specification for your end application if needed.
We offer the following coating options depending on your corrosion resistance and aesthetic requirements:
Let us know your target environment, and we will recommend the appropriate specification.
Minimum order quantities vary by product type and configuration. Standard products are available in smaller volumes, while custom OEM orders typically require higher quantities. Lead times for standard products are generally four to six weeks from order confirmation, depending on specification and volume.
We recommend contacting us with your full requirement so we can give you accurate MOQ and lead time information before you commit.
