
This product is a pan head anti-loosening screw assembly. The head features a pan head design for easy installation with a screwdriver. The front section of the shank has a smooth shoulder, while the rear section has a metric machine thread and is coated with blue anti-loosening adhesive to effectively prevent the screw from loosening under vibration and other conditions, ensuring a stable connection. Common sizes range from M2 to M6, and it can be manufactured from materials such as stainless steel and carbon steel. Various surface treatments are available, including black anodizing, zinc plating, and nickel plating, to meet the needs of different environments. It is widely applicable in electronic equipment assembly, home appliance fixing, communication equipment assembly, precision instrument fastening, and anti-loosening connections of hardware components.
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 fixing, communication equipment assembly, precision instrument fastening, and anti-loosening connection of hardware components.
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 Pan Head Half-Threaded Locking Screw Suppliers and Wholesale Pan Head Half-Threaded Locking 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...