
Machine screws have a large, flat, round head (umbrella head/mushroom head) with a head drive groove. The shank has a full-thread metric machine thread, and the tail is flat. Common sizes range from M2 to M8. Available materials include 304 stainless steel, 316 stainless steel, low-carbon steel, and medium-carbon steel. Surface treatments include stainless steel natural finish, stainless steel passivation, environmentally friendly blue-white zinc plating, color zinc plating, and nickel plating. Suitable for electronic equipment assembly, home appliance mounting, communication equipment assembly, sheet metal connection, and furniture hardware fastening.
GB/T 819.1-2000, ISO 7045, DIN 968, 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.
Electronic equipment assembly, home appliance mounting, communication equipment assembly, sheet metal connection, furniture hardware fastening
Specialized electronic components, specialized communication components
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 Cross Recessed Large Pan Head Machine Screw Suppliers and Wholesale Cross Recessed Large Pan Head Machine 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...