Black Phillips Countersunk Head Wood Screws - Carbon Steel Self-Tapping Screws from China Suppliers and Factory
Manufacturing Process
- Multi Station Cold Heading Technology
- Intelligent Heat Treatment System
- Micron-Level Thread Rolling Process
- Fully Automatic Optical Sorting
- Environmentally Friendly Surface Treatment Line
- Metallographic And Mechanical Joint Laboratory
Quality Control System
- Raw Material Source Locking
- Furnace Number Batch Full Traceability
- Third Party Material Certification
- Process Parameters Open And Transparent
- Salt Spray Test Real Time Monitoring
- International Standard Compliance Declaration
Flexible Customization Capability
- Customizable head/slot Shapes
- Extreme Application Of Special Materials
- Breakthroughs In Extra Large/Long Specifications
- Integrated Assembly Of Components
- Customizable Surface Treatment Colors
- Personalized Packaging And Labeling
Technical Service
- On-Site Failure Analysis
- Selection Calculation And BOM Optimization
- Installation Tool Selection Guidance
- Inventory Management (VMI) Trusteeship
- Free Sample Making And Testing
- International Standard Translation And Interpretation
High Tensile & Hardness Carbon Steel Material
Made of Q235 carbon steel with hardened treatment and black oxide finish. Compared to ordinary low-carbon steel screws, this product offers higher tensile strength (Grade 4.8 ≥400MPa, Grade 8.8 ≥800MPa) and increased hardness to prevent thread stripping or head breakage. When driving into hardwood or composite panels, its high strength ensures smooth penetration without deformation – strong and durable for heavy-load connections in furniture and construction.
Metal Material for Tightening & Anti-Loosening
The carbon steel substrate is heat-treated for excellent elastic limit and torsional strength. The self-tapping sharp thread bites deeply into wood fibers during driving, creating a "female thread" locking effect. Metal material never ages or becomes brittle, maintaining secure fastening under long-term vibration or temperature changes (e.g., outdoor wood structures, movable furniture). High preload is retained after tightening for reliable, long-lasting connections.
Long Service Life with High Wear Resistance
Black oxide finishing increases surface hardness and provides self-lubricating properties, reducing friction wear between the screw and wood during assembly. The countersunk Phillips head fully embeds into the wood surface, preventing tool slippage or head damage. Proven in durability tests, the threads withstand repeated driving and removal without significant wear. Compared to common zinc-plated wood screws, this product offers superior wear resistance and lower replacement frequency in outdoor or repetitive-use applications.
Application Scenarios
High-Quality Self-Tapping Screw Display
Frequently Asked Questions
Our screws are primarily made from high-quality Q235 carbon steel or 304 stainless steel, depending on the specific model, ensuring high tensile strength and durability.
The black oxide finish increases surface hardness, provides self-lubricating properties to reduce friction during installation, and offers enhanced wear resistance compared to standard zinc plating.
Yes, thanks to the heat-treated carbon steel and protective surface treatments, they are designed to maintain secure fastening under vibration and temperature changes common in outdoor environments.
Absolutely. We provide flexible customization for head shapes, slot types, special materials, extra-long specifications, and personalized packaging or labeling.
We implement a full traceability system using furnace numbers, conduct real-time salt spray monitoring, and utilize fully automatic optical sorting to ensure every screw meets international standards.
Yes, we provide free sample making and testing services to ensure our products meet your specific application needs and quality expectations.