2021 wholesale price Hex Lag Screw - Carbon Steel Grade 4.8 8.8 10.9 ZP Black Cross Recessed Countersunk Self-Drilling Screws – Qijing
2021 wholesale price Hex Lag Screw - Carbon Steel Grade 4.8 8.8 10.9 ZP Black Cross Recessed Countersunk Self-Drilling Screws – Qijing Detail:
What is Countersunk Self-Drilling Screws?
Countersunk self-drilling screws are a type of screw used in a variety of fastening and fixing applications. they are produced in hardened carbon steel with bright zinc plated surface treatment. It is equipped with countersunk head. Typically made from stainless steel, countersunk self-drilling screws are characterized by their drill-shaped point. This point enables the screws to drill into materials without the need for pre-drilled pilot holes, resulting in a more efficient fastening process.
Countersunk self-drilling screws come in a variety of sub types, including different sizes. They are also available both with and without wings, providing a greater degree of flexibility for various projects.
Size
Screw head type
product features
Differences Between Self-drilling Screws and Self-tapping Screws?
Although they may sound similar and have strong resemblances in their physical appearance, self-tapping screws and self-drilling screws should not be confused. The two terms are often used interchangeably, but in fact, these are two different types of screw. Their differences are important when it comes to best uses and most suitable applications, so you should not be tempted to use one in place of the other as this could result in a weaker joint between materials.
Self-tapping screws tap their own threads but are unable to drill through materials like a sheet of metal. In this case, self-tapping screws would require a pilot hole. However, self-drilling screws feature a pointed drill bit on the screw, negating the need for a pilot hole as the screw can cut its own thread into the material. These screws are more versatile as they are also able to tap, similarly to self-tapping screws. This makes self-drilling screws highly adaptable and ideal for working with a wider range of materials in different environments and industries.
Applications
Countersunk self-drilling screws are engineered to be corrosion resistant and come in various sizes and materials. Depending on the size, the applications of the countersunk self-drilling screws can vary – the smaller screws are used in applications like fixing thin gauge metals and fixing metal to wood. The larger screws are used in roofing and other industries which require self-drilling through tough metals. Our screws come in stainless steel, alloy steel, carbon steel and other materials which prevents corrosion.
If the counersunk self-drilling screws are used in extremely hard materials, it is advised to use it after a pilot hole has been drilled. Our screws are case hardened and heat-treated for applications requiring fastening of soft materials on hard ones. With a lower installation torque, the threads on these screws allow for a quick transition from drilling to tapping. For effective penetration, make sure that at least three threads of the fastener are inside the material.
Product Parameters
| Product name | Cross recessed CSK self-drilling screws |
| Standard | GB, DIN, ISO, ANSI/ASTM, BS, BSW, JIS etc |
| Size | M2-M24, or non-standard as request&design |
| Material | Stainless Steel SS201, SS303, SS304, SS316, SS410, SS420 |
| SteelC45(K1045), C46(K1046),C20,etc | |
| BrassC36000 ( C26800), C37700 ( HPb59), C38500( HPb58)etc. | |
| Bronze C51000, C52100, C54400, etc. | |
| Iron 1213, 12L14,1215,etc. | |
| Aluminum Al6061, Al6063, etc. | |
| Alloy steel SCM435,10B21, C1033,etc. | |
| Carbon steel C1006,C1010,C1018,C1022,C1035K,12L14,etc. | |
| Non-standards | OEM is available, according to drawing or samples |
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With advanced technologies and facilities, strict high-quality handle, reasonable rate, superior services and close co-operation with prospects, we are devoted to furnishing the best price for our customers for 2021 wholesale price Hex Lag Screw - Carbon Steel Grade 4.8 8.8 10.9 ZP Black Cross Recessed Countersunk Self-Drilling Screws – Qijing, The product will supply to all over the world, such as: Rio de Janeiro, Azerbaijan, Mongolia, As the world economic integration bringing challenges and opportunities to the xxx industry, our company , by carrying on our teamwork, quality first, innovation and mutual benefit, are confident enough to supply our clients sincerely with qualified merchandise, competitive price and great service, and to build a brighter future under the spirit of higher, faster, stronger with our friends together by carrying on our discipline.
By Julie from Manchester - 2017.03.08 14:45
Speaking of this cooperation with the Chinese manufacturer, I just want to say"well dodne", we are very satisfied.
By Jean Ascher from Morocco - 2018.12.28 15:18
