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Countersunk self-drilling screws allow them to be completely or mostly buried in the surface of the material being fixed, avoiding the screw head from protruding, and are particularly suitable for materials such as wood, plastic or metal.
This type of screw is widely used in woodworking, furniture manufacturing, building structures and other fields, and can provide a stronger fixing effect and a simpler installation method.
Note: The length of the countersunk screw is the total length including the head.
Wholesale CSK Head Self Drilling Screws Manufacturers
CSK head Self-drilling Screws
| Material | Carbon steel |
| Head type | Countersunk head (also called flat head) English: CSK or flat head |
| Hardness | Heat treatment strengthened |
| Thread size | Length | ||||||
| 3.5（#6） | 9.5,12,13,14,16,19,22,25mm （3/8"～1"） |
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| 3.9（#7） | 12,13,14,16,19,22,25,32,35,38,40,45,50mm （1/2"～2"） |
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| 4.2（#8） | 13,14,16,19,22,25,32,35,38,40,45,50,60,63,70,75mm （1/2"～3"） |
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| 4.8（#10） | 13,14,16,19,22,25,32,35,38,40,45,50,60,63,70,75,80,90,102mm （1/2"～4"） |
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| 5.5（#12） | 16,19,22,25,32,35,38,40,45,50,60,63,70,75,80,90,102mm （5/8"～4"） |
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CSK Head Self-Drilling Screws - Precision Fastening for Metal and Steel Structures
Product Features
- Integrated Drilling Point: The screw features a self-drilling tip that eliminates the need for pre-drilling, improving installation efficiency in steel and metal substrates.
- CSK (Countersunk) Head Design: The countersunk head allows for a flush surface finish after installation, suitable for applications where a smooth and clean appearance is required.
- Surface Coating Options: Available in zinc-plated, galvanized, or stainless-steel finishes to provide enhanced corrosion resistance under various environmental conditions.
Product Description
The CSK head self-drilling screw is manufactured in compliance with ISO, DIN, and ASTM standards. It is designed for direct fastening of thin metal sheets, aluminum panels, and structural steel components. The drill point geometry allows consistent penetration without material deformation, ensuring stable mechanical performance and long-term fastening reliability.
Application Fields
This product is suitable for the following applications:
- Fastening of sheet metal roofing and cladding systems
- Steel frame assembly and light-gauge structural connections
- Installation of HVAC ducting, panels, and enclosures
- Automotive bodywork and component fixing
- General-purpose fastening in construction and industrial manufacturing
FAQ
1. What is the main difference between CSK head self-drilling screws and pan head self-drilling screws?
CSK head self-drilling screws are designed for flush installation, allowing the screw head to sit level with the material surface. In contrast, pan head screws remain exposed above the surface, which can be beneficial for certain structural or non-decorative assemblies. The choice depends on the required finish and load distribution characteristics.
2. Can CSK head self-drilling screws be used for stainless-steel sheet fastening?
Yes, they can. When fastening stainless-steel sheets, it is recommended to use stainless-steel variants (A2 or A4) to prevent galvanic corrosion. The self-drilling tip ensures smooth penetration without damaging the sheet, maintaining joint integrity and preventing rust formation at the connection point.
3. How do I select the right drilling capacity for my project?
The drilling capacity should match the combined thickness of the materials being joined. For example, screws with a #2 drill point are suitable for up to 2.5 mm steel, while #3 points can handle up to 5 mm. Selecting the correct capacity improves installation speed and prevents tip breakage or surface damage.
Company
Wuxi Sharp Metal Products Co., Ltd.
Wuxi Sharp Metal Products Co., Ltd. is China Wholesale
CSK Self-Drilling Screws Suppliers and Countersunk Head Self-Drilling Screws Factory, a professional enterprise that produces and sells screws. As Self Drilling Screw Manufacturers, our main products include carbon steel screws, stainless steel self tapping screws, wood screws, drywall screws, fiber screws, cement screws, etc. We also engage in the trade of door and window accessories. We were officially registered and established in 1993 and are located in Yanqiao Industrial Park, Huishan District, Wuxi City, Jiangsu Province.
Our company has a factory of 6000 square meters, with more than 100 machines and inventory of over 800 tons. The annual output is about 2000 tons. Since 2000, we have been supplying plastic steel door and window accessories, which are now widely used in the assembly and installation of aluminum alloy engineering doors and windows, home decoration door and window systems, as well as import and export. we offer Countersunk Self Drilling Screws for sale.
Our company has large-scale production and warehousing capabilities. Improving product quality, enhancing employee competence, implementing a strict quality assurance system and a comprehensive management system, and providing high-quality after-sales service for our products are our foundation. Our company adheres to the principle of "quality first, reputation first" and provides customers with a variety of products with guaranteed quality and quantity. In the fierce market competition, keep up with the times, maintain innovation, and ensure product leadership! Relying on technology, continuously improving the technological content of the products sold, and creating higher market value for society, customers, and companies. Our company has always been founded with integrity and operates the market with integrity, winning a good reputation and the respect of domestic and foreign peers.
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A company specializing in the production and sales of screws
Contact Information
- No.1 Shiguqiao East Road, Yanqiao Industrial Park, Huishan District, Wuxi City, Jiangsu Province, China
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[email protected]
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+86-15052135118
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+86-15052135118
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Wholesale Countersunk Self Drilling Screws Factory
