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Black Phillips Countersunk Head Wood Screws - Carbon Steel Self-Tapping Screws from China Suppliers & Factory

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Name: Phillips Countersunk Self-Tapping Screws (Phillips Countersunk Head Wood Screw / Self-Tapping Screw)
, Material: Q235 Carbon Steel
, Standards: GB/T 845, DIN 7997, ISO 10666
, Grade: .4.8/8.8 Grade Carbon Steel
, Specifications: M2-M6, 6mm-200mm (customizable)
, Surface Treatment: Blackening/Oxidation (Anti-oxidation, improves surface hardness, rust prevention, and aesthetics), Electro-galvanizing (Blue-white zinc/Color zinc), Nickel Plating
, Design Features: Phillips countersunk head design, self-tapping pointed thread structure, high-hardness carbon steel material, black anodized surface, complete specifications
, Application Areas: Ideal for furniture manufacturing, construction decoration, DIY projects, general assembly, and outdoor installations
, Delivery Time: 15-30 days after receiving advance payment
, Origin: China
, Brand: JGD
, Minimum Order Quantity: 10,000 pieces, negotiable
, Samples: Available for evaluation
, Packaging: Boxed, Bulk, Pallet, or customized packaging options
, OEM: Available
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, As a leading China supplier with a well-equipped factory, we pride ourselves on our high-quality Phillips Countersunk Self-Tapping Screws. Our products meet international standards and are designed to cater to a wide range of applications. With our commitment to quality and customization, we ensure that you get the best solutions for your assembly needs.

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    Key Features

    Our self-tapping screws are crafted from food-grade 304 stainless steel and treated to achieve metric Grade 12.9 ultra-high strength, overcoming the traditional hardness limitations of standard stainless steel. Featuring a countersunk Phillips head design, these screws can be installed flush with the workpiece surface for a zero-profile finish, making them ideal for precision electronics and architectural decoration. We have optimized the thread geometry for different substrates (metal, wood) to ensure low-torque driving with high-torque clamping, effectively preventing stripping. As a superior alternative to standard Tek screws, these fasteners perform exceptionally well in thin sheet metal connections, providing an intelligent fastening solution that balances aesthetics with high load-bearing capacity.
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    Precision Manufacturing Process

    From wire rod to finished product, we strictly adhere to multiple international standards including ISO, DIN, ANSI, and GB. Utilizing multi-station cold forging technology, we ensure shank diameter tolerances are controlled within microns. Threads are formed through a precision thread rolling process to enhance fastening force. For non-standard requirements, we employ optical imaging sorters to reject minute defects like head cracks. In post-treatment, we offer a wide range of surface finishing options: from conventional zinc plating and nickel plating to highly corrosion-resistant Hot-Dip Galvanizing (H.D.G.), as well as decorative polishing and black anodizing. We even provide food-grade passivation treatment, ensuring every screw has a prolonged fatigue life in demanding environments.
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    Transparency & Customization

    As a source factory, we are committed to breaking down the information barriers of traditional trade. From mill certificates for raw materials to hardness grades (covering Grade 4.8 to Grade 12.9, as well as A2-70 and A4-80 marine-grade stainless steel), all test data is traceable. We support full-chain customization: dimensionally, we can adjust thread length and head thickness according to drawings; functionally, we can combine processes like sandblasting, electrophoretic coating (e-coating) , or chrome plating. Whether you need British Standard (BS) fasteners or require a special colored anodized finish, we offer small-batch sampling. This ensures that when you purchase fasteners from us, you not only receive high-quality products but also full transparency and control over the entire process, from material selection to packaging.
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    No Pre-Drilling · Rust Resistant · More Secure

    This stainless steel Phillips countersunk self-tapping screw, with its rust-resistant and corrosion-resistant material, one-step self-tapping design, and aesthetically pleasing countersunk head structure, has become the preferred solution for metal substrate fastening scenarios that is efficient, reliable, and aesthetically pleasing.
    Product Details

    Manufacturing Process
    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
    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
    Customization Capability
    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
    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 Carbon Steel

    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.

    Anti-Loosening Material

    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. High preload is retained after tightening for reliable, long-lasting connections.

    Wear Resistance

    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.

    Application Scenarios

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    High-Quality Self-Tapping Screw Display

    Frequently Asked Questions

    What materials are these self-tapping screws made of?
    Our screws are primarily made of high-quality Q235 carbon steel or 304 stainless steel, featuring hardened treatments for superior tensile strength and durability.
    What are the benefits of the black oxide finish?
    The black oxide finish increases surface hardness and provides self-lubricating properties, which reduces friction during installation and enhances wear resistance.
    Can I request customized dimensions or head shapes?
    Yes, we offer flexible customization capabilities, including specialized head shapes, slot types, extra-long specifications, and personalized packaging.
    How do you ensure the quality of each batch?
    We implement a full traceability system using furnace numbers, third-party material certification, and real-time monitoring of process parameters and salt spray tests.
    Are these screws suitable for heavy-load furniture applications?
    Absolutely. With Grade 4.8 or 8.8 strength ratings and heat-treated torsional strength, they are designed for secure, heavy-load connections in both furniture and construction.
    Do you provide technical support for selection?
    Yes, our technical services include on-site failure analysis, selection calculations, BOM optimization, and guidance on installation tool selection.