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Self-Tapping Screw with Washer Assembly
This product is a self-tapping screw and washer (flat/spring washers) combination set. The self-tapping threads are sharp, allowing for one-step drilling, tapping, and tightening. The washers distribute pressure, preventing loosening and indentation. The combination provides a precise fit, eliminating the need for separate washer selection. The full range covers mainstream systems, is readily available, has a rust-proof surface treatment, passes quality control, complies with environmental regulations, and compliance documents can be provided. Customization of non-standard combinations (screw + washer specifications matching) is supported, suitable for high-efficiency assembly scenarios.
- Executive Standard
- Specification Range
- Grade & Strength
- Common Materials
- Surface Treatment
- Surface Treatment
- Industry Classification
National Standards GB/T 9074.18 and GB/T 5280 (Self-tapping screw threads); International Standards ISO 1478 and ISO 10666; American Standard ANSI/ASME B18.6.4; German Standard DIN 7981;
Metric specifications: self-tapping thread specifications ST1.5~ST9.5, nominal length 3mm~50mm, matching flat washers, spring washers, and combination washers of the same specifications. Washer types and combination configurations can be customized. Imperial specifications: thread specifications #0-80~#14-20, nominal length 1/8"~2", compatible with UNC/UNF self-tapping thread systems, matching American standard washers.
Carbon steel grades 4.8, 6.8, and 8.8; stainless steel grades A2-50, A2-70, A4-70, and A4-80; non-ferrous metals grade not lower than 4.8.
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.
It is suitable for connecting soft materials such as home appliances, furniture, thin steel plates, and plastic parts without pre-drilling. The modular design eliminates the need for separate assembly of washers, improving 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 Self-Tapping Screw with Washer Assembly Suppliers and Wholesale Self-Tapping Screw with Washer 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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