
This product features an expansion riveting structure, cold-forged, with the riveting end expanding to tightly fit the workpiece hole wall. It boasts precise internal threads, easy installation, and is suitable for connecting thin workpieces without welding. The entire series is readily available, with rust-proof surface treatment, and meets environmental regulations through quality control. Compliance documentation is available, and customization of non-standard sizes and expansion structures is supported.
Industry-standard US PEM Z series; Chinese national standard GB/T 17880 series; international standard ISO 13918;
Metric specifications: Internal thread sizes M2~M10, suitable for sheet metal thicknesses of 0.5mm~3mm, divided into four main categories: round, hexagonal, through-hole, and blind-hole; Imperial specifications: Internal thread sizes #2-56~5/16"-18, suitable for UNC/UNF American standard thread systems, suitable for sheet metal thicknesses of 0.02"~0.12"
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 thin plates, sheet metal parts, plastic parts, etc. The ends are expanded by riveting tools and fixed in the workpiece hole, ensuring a reliable connection.
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 Expansion Rivet Nuts Suppliers and Wholesale Expansion Rivet NutsExporter && 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...