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3-Combination Screw Assembly
This product is a one-piece cold-forged screw, flat washer, and spring washer, featuring precise threads and a secure connection between the washer and screw, preventing it from easily falling off. It combines tightening and anti-loosening functions, is easy to install, and requires no additional washers. The full range covers various head types, is readily available, and features rust-proof treatments such as galvanizing and Dacromet coating. It complies with quality control and environmental regulations, and compliance documentation can be provided. Customization of non-standard specifications is also supported.
- Executive Standard
- Specification Range
- Grade & Strength
- Common Materials
- Surface Treatment
- Surface Treatment
- Industry Classification
National Standards GB/T 9074.4 (pan head), GB/T 9074.8 (small pan head), GB/T 9074.13 (countersunk head); International Standard ISO 10644; American Standard ANSI/ASME B18.6.3; German Standard DIN 6900;
Metric specifications: Thread sizes M1.6~M12, nominal lengths 3mm~80mm, available in full thread and half thread, compatible with pan head, countersunk head, and internal hexagonal head head types, and comes with a flat washer + spring washer combination; Imperial specifications: Thread sizes #2-56~5/16"-18, nominal lengths 1/8"~3", compatible with UNC/UNF thread systems, and comes with American standard washers.
High-quality low-carbon steel, medium-carbon steel, alloy steel, 304 stainless steel, 316 stainless steel, brass, aluminum alloy, etc.
Environmentally friendly blue-white zinc, colored zinc, black zinc, environmentally friendly nickel plating, zinc-nickel alloy plating, Dacromet coating, electrophoresis, PVD, stainless steel natural color, stainless steel passivation, etc.
Electronic equipment, chassis and cabinets, home appliances, furniture, etc., are suitable for batch assembly scenarios. No separate gaskets are required, saving assembly time and improving assembly efficiency.
Do you need non-standard fasteners, precision metal parts, or custom structural components for a specific application?
Yongji helps you develop and manufacture special parts and custom products based on your drawings, samples, technical requirements, and target application scenarios.
Whether you need prototype quantities, pilot production, or stable mass supply, we provide an integrated solution from engineering review to production and delivery.
From fasteners to structural parts, Yongji offers integrated development and manufacturing for a wide range of custom precision hardware products.
Whether you need a few pieces for validation, small batches for development, or large volumes for mass production, we can support your project at different stages.
With integrated manufacturing resources in China and Vietnam, Yongji helps customers achieve stable quality, scalable production, and reliable delivery.
Yongji Precision Hardware is a global manufacturer specializing in precision fasteners and metal structural components. We are China 3-Combination Screw Assembly Suppliers and Wholesale 3-Combination Screw AssemblyExporter && Company. Founded in 2003, the company has over two decades of experience serving international OEM and ODM customers across multiple industries.
With integrated manufacturing capabilities including cold heading, stamping, CNC machining and sheet metal fabrication...
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