Roofing screws are specially designed for securing roofing materials, such as metal panels or shingles, to the main structure. Most roofing screws have sharp, self-drilling points and durable threads so that they can easily penetrate the roofing material and securely fasten it to the roof deck or framework.
Most roofing screws will come with type17 points to allow easy material penetration. We offer a wide range of these screws with different finishes for various roofing applications. If you need custom designed screws in bulk we will be happy to accommodate you.
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. If you require a specific testing regime for your orders, please let us know and we will do our best to accommodate your needs.
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.
We are a professional precision screw manufacturer operating directly. We also represent various fastener products from Taiwan, forming a comprehensive supply chain to ensure quality. We welcome your inquiries.
Our product range includes screws, bolts, nuts, precision small screws, SEMS screws, washers, rivets, CNC precision machining, metal stamped parts, and a variety of custom fasteners.
The delivery time largely depends on the quantity of the order. We have some standard specification products in stock, while custom products typically take between 30 to 75 days for delivery.
Yes, we can provide samples upon request. However, due to the vast array of screw specifications, we might not have the exact specifications you need in stock. In that case, we will send you products with similar specifications for your reference.
If you require a customized product, we will produce a small batch of samples for your approval after you place your order. Once you confirm the samples, we will proceed with mass production.
Customization is our forte. You can provide us with diagrams, design drawings, or a list of requirements, and our expert team will provide a quote based on your specifications.
Please provide the specifications and quantity of the screws you need. Specifications should include material, surface treatment, head type, driver type, thread type, point type, and dimensions (Metric, Imperial, US).
The MOQ varies depending on the material. As a professional screw manufacturer, our MOQ is 50,000 pieces for stainless steel and 100,000 pieces for carbon steel. This requirement, which may seem high to some customers, is designed to ensure product quality, cost-effectiveness, production efficiency, and shipping efficiency, and to pass on price benefits to customers. For special-purpose screws or orders with a high total quantity, we also support a lower MOQ, making cooperation very convenient.
Carbon steel screws will rust when exposed to moisture unless they are coated with an anti-rust coating or made of stainless steel. However, if the anti-rust coating is worn or chipped due to external factors, thereby reducing its anti-rust strength, rust may occur under the coating. Stainless steel screws are the most resistant to rust and corrosion. Although they are more expensive, their rust resistance is not easily reduced because the entire structure of the screw is stainless steel.
Our products are certified by ISO 9001, which is an international standard for quality management systems. This certification ensures that we adhere to best practices for producing high-quality products that meet our customers’ expectations and requirements.
Some of our products also have CE certification, which is a mark that indicates conformity with health, safety, and environmental protection standards for products sold within the European Economic Area. Please contact us for CE-certified products.
