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Thick Flat Washer (Zinc-Plated)
Thickened flat washers are general-purpose fasteners with a ring-shaped flat structure. They have a larger outer diameter and significantly increased thickness compared to ordinary washers. The inner hole is of standard bolt fit dimensions, with no chamfer or only slight chamfer. Common materials for this product include low-carbon steel, medium-carbon steel, alloy steel, 304 stainless steel, and 316 stainless steel. Different materials correspond to different strength grades; low-carbon steel is typically grade 4.8, medium-carbon steel can reach grade 8.8, and alloy steel can reach a maximum of grade 12.9. Various surface treatments are available, including environmentally friendly blue-white zinc plating, color zinc plating, black zinc plating, hot-dip galvanizing, Dacromet coating, stainless steel natural finish, and stainless steel passivation. Sizes range from M3 to M24, conforming to standards such as GB/T 96, GB/T 97, ISO 7089, and DIN 125. Due to their unique structure and performance, they are widely used in steel structure connections, heavy machinery assembly, outdoor engineering fixing, automotive chassis components, and heavy equipment installation, effectively distributing the pressure of bolts or nuts on the connected parts and enhancing the stability and reliability of the connection.
- Executive Standard
- Specification Range
- Grade & Strength
- Common Materials
- Surface Treatment
- Surface Treatment
- Industry Classification
M3~M24, We support customized production based on customer-provided drawings or industry standards.
Available grades: Carbon steel 4.8/6.8/8.8/10.9/12.9; Stainless steel A2-50, A2-70, A4-70, A4-80
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.
Steel structure connection, heavy machinery assembly, outdoor engineering fixing, automotive chassis components, heavy equipment installation
Automotive parts
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 Thick Flat Washer (Zinc-Plated) Suppliers and Wholesale Thick Flat Washer (Zinc-Plated)Exporter && 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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