
This product features a pan head, an integrated washer, and machine threads. The head is compatible with screwdrivers, the pan head is rounded and aesthetically pleasing, the washer is integrally molded to distribute pressure and prevent indentation, and the threads are precise for a secure connection. The full range covers mainstream systems, is readily available, has a rust-proof surface treatment, passes quality control, complies with environmental regulations, and compliance documentation can be provided. Non-standard customization is supported, and it is suitable for fastening precision components.
National Standards GB/T 9074.4 and GB/T 9074.8; International Standard ISO 10644; American Standard ANSI/ASME B18.6.3; German Standard DIN 6900;
Metric specifications: Thread sizes M1.6~M10, nominal lengths 3mm~80mm, available in two main types: flat washer two-piece combination and flat washer + spring washer three-piece combination, all with a fully threaded structure; Imperial specifications: Thread sizes #2-56~#14-20, nominal lengths 1/8"~3", compatible with UNC/UNF American standard thread systems.
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.
Suitable for electronic equipment, instruments and meters, etc., it is compatible with pre-drilled and internally threaded precision workpieces. The pad design eliminates the need for additional washers and is suitable for surface flatness requirements.
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 Pan Head SEMS Screw Suppliers and Wholesale Pan Head SEMS 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...