Concrete screws are specialized fasteners designed to securely anchor objects into masonry substrates such as concrete, mortar joints, concrete blocks, and brick. These screws can be specified for fire and seismic resistance and are usually made from corrosion resistant materials.
Concrete screws are available with different head types, such as hex heads, flatheads, and pan heads. Hex head screws offer firmer tightening, while flathead and pan head screws provide a flush fix against the attached material, making them suitable for specific applications like fastening channels directly to the ceiling for pipe or ventilation installations.
When selecting concrete screws, it’s important to consider the type of concrete being used, whether it is cracked or non-cracked. Cracked concrete refers to areas affected by tensile load, where cracks may develop over time, even in reinforced zones. Non-cracked concrete zones, which are typically walls or columns, have a lower probability of developing cracks after installation. Understanding the distinction between cracked and non-cracked concrete helps ensure the appropriate choice of anchor for optimal safety and load capacity.
Concrete screws have a double lead with alternating raised and lowered threads, along with notches cut into the raised threads. This design allows the threads to tap into pre-drilled holes in masonry effectively. The screws also feature a diamond-shaped nail-type point for easy insertion.
he screws are case hardened to maximize thread strength without making the screw brittle. This ensures that the head of the screw does not shear off when driving into hard masonry. However, reusing the screw in the same hole is not recommended due to thread wear, which can result in decreased grip strength.
The suggested maximum embedment into the substrate should not exceed 1-3/4″ to maintain thread effectiveness.
We carry out stringent quality checks during and after production for all of our orders and we provide detailed inspection reports for customers with each shipment. If you have particular regulatory requirements then please let us know and we will do our best to accommodate your needs.
Our manufacturing facilities all have dedicated quality inspection labs and systems to perform extensive checks on all of the products that you order. Please contact us if you would like to know more about our quality checking procedures.
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.
