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Countersunk Self-Tapping Screw
This product features a cross-groove + countersunk + self-tapping thread structure, cold-forged for sharp threads, allowing direct tapping into soft materials without pre-drilling. The countersunk angle adapts to the workpiece's countersunk hole, resulting in a flush and aesthetically pleasing finish after installation. The full range covers mainstream specifications, with readily available stock. Surface rust prevention treatment ensures compliance with quality control and environmental regulations; compliance documentation is available. Custom lengths and thread specifications are supported.
- Executive Standard
- Specification Range
- Grade & Strength
- Common Materials
- Surface Treatment
- Surface Treatment
- Industry Classification
National Standard GB/T 846; International Standard ISO 1481; American Standard ANSI/ASME B18.6.4; German Standard DIN 7982; Countersunk Angle 90° (National Standard/European Standard), 82° (American Standard)
Metric specifications: Self-tapping thread specifications ST1.5~ST9.5, nominal length 3mm~50mm, thread types AB and B fully covered; Imperial specifications: Thread specifications #0-80~#14-20, nominal length 1/8"~2", compatible with UNC self-tapping thread system, 82° countersunk angle.
Carbon steel grades 4.8, 6.8, 8.8, 10.9, and 12.9; stainless steel grades A2-50, A2-70, A4-70, and A4-80; non-ferrous metals grade not lower than 4.8.
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 connection scenarios with high aesthetic requirements, including wood, plastic parts, thin steel plates, and decorative parts, the countersunk head design allows the screw head to be flush with the workpiece surface without protruding.
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 Countersunk Self-Tapping Screw Suppliers and Wholesale Countersunk Self-Tapping 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...
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