
Flange nuts are precision fasteners with a standard hexagonal head and a flange at the bottom. The flange face has anti-slip serrations to effectively prevent loosening. The inner hole has a metric machine thread, and common sizes range from M3 to M20. A wide variety of materials are available, including 304 stainless steel, 316 stainless steel, low carbon steel, medium carbon steel, and alloy steel. Surface treatments are diverse, including stainless steel natural finish, stainless steel passivation, environmentally friendly blue-white zinc plating, color zinc plating, hot-dip galvanizing, and Dacromet coating. They are widely used in mechanical equipment assembly, automotive parts connection, rail transit equipment, outdoor engineering structures, and sheet metal fastening, making them a common product among general-purpose fasteners.
M3~M20, 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.
Mechanical equipment assembly, automotive parts connection, rail transit equipment, outdoor engineering structures, sheet metal fastening
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 Hex Flange Nut Suppliers and Wholesale Hex Flange NutExporter && 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...