
This product features a head, step, and thread structure. The step boasts high precision and a smooth surface, combining positioning and fastening functions. Cold-forged and ground, it ensures high coaxiality and a secure, precise connection. The entire series includes various head types, readily available in stock. Rust-proof and corrosion-resistant treatment ensures compliance with environmental regulations. Compliance documentation is available, and non-standard customization is supported. Suitable for precision positioning and fastening.
National Standard GB/T 5281 (Hexagon socket head cap screws); International Standard ISO 7379; American Standard ANSI/ASME B18.3.4; German Standard DIN 7979; Non-standard stepped screws can be customized according to customer drawings.
Customized according to the drawing
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.
Precision instruments, molds, etc., suitable for positioning and guiding scenarios, precise positioning of steps, with fastening function, and suitable for high-precision 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 Shoulder Screw Suppliers and Wholesale Shoulder ScrewExporter && 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...