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Black Phillips Countersunk Wood Screws - China Suppliers, Factory Direct Carbon Steel Self-Tapping Screws for Furniture & Construction

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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 (for anti-oxidation, enhanced surface hardness, rust prevention, and aesthetics), Electro-galvanizing (Blue-white zinc/Color zinc), Nickel Plating
Design Features: Innovative Phillips countersunk head design, self-tapping pointed thread structure, made from high-hardness carbon steel, and features a black anodized surface with a comprehensive range of specifications
Application Areas: Ideal for furniture manufacturing, construction decoration, DIY handcrafted 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
Packaging: Boxed/Bulk/Pallet or customized packaging
OEM: Available
As a leading manufacturer and supplier in China, we pride ourselves on providing high-quality Phillips Countersunk Self-Tapping Screws, designed to meet various industrial needs while ensuring durability and performance.

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    304 Stainless Steel Cross Recessed Countersunk Head Self-Tapping Screws01
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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
    Flexible Customization Capability

    Flexible Customization

    • 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 (e.g., outdoor wood structures, movable furniture). 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. 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

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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 manufactured from high-quality Q235 carbon steel, which undergoes a specialized hardening process to achieve superior tensile strength and durability compared to standard fasteners.
    What are the benefits of the black oxide finish?
    The black oxide surface treatment provides increased surface hardness, excellent wear resistance, and mild corrosion protection. It also offers a sleek, professional aesthetic suitable for furniture and decorative wood projects.
    Can these screws be used in hardwood without breaking?
    Yes. Thanks to our multi-station cold heading technology and intelligent heat treatment, these screws feature high torsional strength, allowing them to penetrate hardwood and composite materials without deforming or snapping.
    Do you offer customization for specific project requirements?
    Absolutely. We provide flexible customization capabilities, including various head and slot shapes, extra-long specifications, special material applications, and personalized packaging or labeling.
    How do you ensure the quality of each batch?
    We implement a comprehensive quality control system featuring full furnace number batch traceability, third-party material certification, and real-time salt spray monitoring in our joint laboratory.