Self-drilling screws for thick steel
Self-drilling screws for thick steel

Self-drilling screws for thick steel


In the construction and fabrication industries, details play a pivotal role in the success of a project. A primary consideration is the selection of appropriate fasteners, especially when dealing with durable materials like thick steel. Self drilling screws for thick steel have become increasingly important, offering both convenience and strength.

Specifically designed for thick steel applications, these self-drilling screws for thick steel represent the intersection of modern engineering needs and advanced design solutions. In this article, we will explore the significance, features, and benefits of self-drilling screws for thick steel applications.

What are self-drilling screws for thick steel?

Self-drilling screws for thick metal are a type of fastener that can be used to attach two pieces of metal together without the need to pre-drill a hole. They have a sharp tip that can drill through metal, and then the threads of the screw engage with the metal to create a strong connection.

About Self Drilling Screws

The defining feature of these screws is their drill-point tip. Unlike standard screws that may have a flat or sharp tip, self-drilling screws possess a pointed, fluted end reminiscent of a drill bit. This allows the screw to bore into materials, particularly metals, with ease.

When discussing thick steel or any dense metal, self-drilling screws become especially relevant. Their drill-point tip is specifically crafted to penetrate these hard materials without requiring a separate drilling step, which can save significant amounts of time and effort.

It’s essential to differentiate self-drilling screws from self-tapping screws, though they’re often used interchangeably in conversation. While both can create their own threads, only self-drilling screws have the drill-point tip that allows for direct penetration into metals without the necessity of a pre-drilled hole.

What thickness of material can self-drilling screws for thick steel penetrate?

Typically, for light gauge metals, screws with a #1 drill point are suitable for metals up to 0.89mm thick, while those with a #2 drill points can handle up to 2.54mm. For medium gauge metals, screws with a #3 or #4 drill points are ideal, drilling through metals up to about 5.33mm thick. There are also screws designed for very thick metals, with drill points capable of penetrating thicknesses greater than 12.7mm.

Cheng Hao provides specialist self-drilling screws for thick steel which are manufactured with NSSC 500 series steels and these are able to penetrate Stainless Steel plate up to 5mm thick or Steel Plate up to 15mm thick due to the extreme durability of the steel.

What are the most common applications for self drilling screws for thick metal plates?

What are the most common applications for self-drilling screws for thick steel plates?

Self-drilling screws for thick steel plates have been an essential asset in many industries and applications due to their ability to simplify and expedite assembly processes. Some of the most common applications include:

  1. Construction & Infrastructure:
    – Steel Framing: Used in erecting steel frameworks for buildings, bridges, and other structures.
    – Metal Roofing & Cladding: Facilitates the attachment of metal sheets to underlying steel frameworks or to other metal sheets.
    – HVAC Systems: Essential in attaching components in heating, ventilation, and air conditioning systems.
  2. Industrial Equipment & Machinery:
    – Heavy Machinery Assembly: Connects thick metal components in machines used in industries like mining, construction, and agriculture.
    – Storage Racks & Shelving: Assists in the assembly of industrial storage solutions.
  3. Transportation:
    – Shipbuilding: Used in assembling parts of ships, especially where watertight seals are crucial.
    – Rail Infrastructure: In the construction of rail-related structures, including overhead line equipment and signal structures.
  4. Energy Sector:
    – Solar Panel Installations: Mounting solar panels onto thick metal supports or frames.
    – Wind Turbines: Assembling parts of wind turbines, especially in tower or nacelle construction.

Energy Sector

Cheng Hao – Self Drilling Screw Supplier

At Cheng Hao we have decades of experience supplying high volume and small batch self-drilling screws for global customers to meet their challenging assembly and construction requirements. All our products are 100% manufactured in Taiwan. Please contact us to find out more about these or other products that you require.



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.

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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.

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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.

Send us your design

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.

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