Sanwei:Your Professional Combination Screw Manufacturer!
Hebei Sanwei Fasteners Co., Ltd. is a high-tech enterprise specializing in the research, development, production, and sale of fasteners, located in Hebei Province, China. Since its establishment,wei has been committed to providing customers with high-quality, high-performance fastener solutions, which are widely used in various fields such as construction, machinery manufacturing, automobile, and power communication.
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DIN7504K Carbon Steel Hex Flange Self-Drilling Screw With Composite EPDM Washer (Roofin...This high-performance composite flat washer screw is precision-manufactured from durable carbon steel, delivering exceptional tensile strength and structural integrity. The innovative composite
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Wood Screw CombinationStandard: DIN571. Name: Wood Screw Set. Material: carbon steel and alloy steel, etc.. Grade: 4.8 grade, 5.8 grade, 8.8 grade
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Phillips Slot Combination ScrewStandard: DIN6900. Name: Cross recessed combination screws. Material: Carbon steel and alloy steel, etc.. Grade: Grade 4.8, Grade 5.8, Grade 8.8
Why Choose Us
OEM/ODM Service
Our customised fasteners are made to your special requirements. It can be fully threaded or partially threaded, and the thread, driving method, material, length, head shape, plating and all these can be specially designed according to your needs.
Good CNC machining technology
From material selection to finished products, Handan Sanwei provides you with comprehensive solutions when it comes to customised fasteners. The fasteners we make are high precision and strong. No matter what kind of precision you need, we can meet it and guarantee your satisfaction.
Strong engineering design team
Our company has an excellent and professional engineering team, and a number of technicians are elites in the industry. The staff always strives to explore new methods and technologies. From the selection of metals and special alloy materials to the finished fasteners, we can solve all aspects of the whole project engineering.
Professional Testing Laboratory
Quality assurance and testing is an important part of producing fasteners. Handan Sanwei has a specialised quality testing laboratory with spectrometers, hardness testers, tensile testers, salt spray test chambers and other equipment, where raw materials and final products are strictly tested. In addition, the company also has experienced testing experts who use professional methods to comprehensively test the fasteners and finally give you a detailed test report.
Digital Quality Control System
We rely on our self-developed full-process digital quality inspection system to strictly control every step from raw materials entering the factory to finished products being shipped. This system will always monitor the quality of the products to ensure that each batch of products meets the industry standards and complies with customer requirements. In addition, it collects and feeds back data in real time, giving you a clear understanding of product quality.
Advantages of Combination Screw
Strong Shear Resistance
Thanks to their special structure and the use of high-strength materials, combination screws exhibit excellent shear resistance. They can withstand greater force and shear pressure, making them ideal for applications that require high-strength connections. Whether in high-pressure or violent environments, combination screws excel in providing reliable and secure fastening solutions.
Wide Range of Applications
Combination screws find extensive applications across different industries and settings. Whether it is in construction, automotive, electronics, mechanical manufacturing, or other fields, combination screws meet various requirements and deliver outstanding connection performance. They can be utilized for securing components, assembling equipment, or protecting valuable items, among many other applications.


Error Reduction
The installation process of combination screws is simpler and more straightforward compared to traditional screws. This reduces the likelihood of errors during assembly. Installation personnel can easily follow a few simple steps and use standard tools to complete the assembly within a few steps. This minimizes human errors and the risk of assembly failures, thereby increasing the success rate of assembly operations.
Enhanced Production Efficiency
The convenience of assembly provided by combination screws significantly reduces the time required for assembly. This allows production lines to operate more efficiently, speeding up the overall production process. By saving time and reducing waiting periods, combination screws contribute to improved production efficiency and lower production costs.
Specification
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Standard |
DIN |
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Name |
Combination Screw |
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Material |
Carbon steel and alloy steel, etc. |
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Grade |
Grade 4.8, Grade 5.8, Grade 8.8 |
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Nominal diameter |
M2-M48 |
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Pitch |
0.4-5 |
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Surface treatment |
ZP,YZ,BLACK |
Application of Combination Screw
Woodworking field
In woodworking, combination screws are frequently utilized to assemble furniture, ensure structural integrity in cabinetry, and even in framing real estate projects. The clean finish provided by flat or oval heads ensures that screws do not detract from the overall aesthetic of the furniture or installation. Woodworkers benefit from the option of using self-tapping screws that eliminate pre-drilling, thus speeding up the assembly process without sacrificing quality.
Manufacturing
Beyond woodworking, combination screws also find their relevance in metalworking applications. Manufacturing sectors often require fixtures and machined parts to hold together under various forces. The robust design of combination screws ensures a secure connection, making them ideal for demanding environments like automotive or aerospace engineering.
Home Improvement Project
Home improvement projects are another area where combination screws excel. Whether hanging shelves, securing brackets, or performing general repairs, the convenience of having a screw that accommodates both types of drivers makes it a go-to option for casual DIY enthusiasts and professional contractors alike.
Electronics Industry
Combination screws contribute significantly in the assembly of appliances, devices, and machinery. The electronics sector often leverages the advantages of combination screws to provide secure yet serviceable fittings. Craftsmanship quality is essential for product reliability, and the durability of combination screws plays a crucial role in ensuring that appliances withstand the test of time.

Best Practices for Using Combination Screws
When using combination screws, it is first essential to choose the right type for the specific application. Consider the material you are working with and select a screw made from a compatible material. For outdoor applications, stainless steel screws are often recommended due to their corrosion resistance. If you are working with softer woods, ensure the use of screws that are less likely to split the material, like those with a tapered tip.
Secondly, ensure that you are using the right size of screw for the job. Using screws that are too short may not provide the necessary holding strength, while oversized screws can damage the material and lead to structural weaknesses. Generally, a good practice is to consult reference guides for the appropriate length and diameter based on your application's specifics, such as load requirements and material type.
Proper driving technique is also fundamental to ensuring the longevity and effectiveness of combination screws. If you opt for self-tapping screws, be sure to apply sufficient pressure while tightening and ensure that the screw enters straight. This will help prevent cross-threading, which can lead to a compromised hold — a crucial factor for applications requiring high durability.
When driving screws into hardwoods, it is often useful to drill pilot holes to avoid splitting. For metals, the use of lubrication can facilitate smoother screwing, enhancing efficiency and reducing wear on both the screw and the tools used.
Finally, regular inspections and maintenance of projects involving combination screws can also greatly extend the life of the fastener. Over time, materials may shift or settle, potentially loosening screws. Periodically checking and tightening screws can uphold the integrity of the project, ensuring that it remains reliable and safe.
Packaging and Shipping

FAQ
We're professional combination screw manufacturers and suppliers in China, specialized in providing high quality products and service. We warmly welcome you to wholesale customized combination screw made in China here from our factory. Contact us for quotation.
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