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Black Coated 410 Stainless Steel Self-Drilling Tek Screws from China Suppliers & Factory for Metal Sheet Mounting

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Name: Black Large Flange Phillips Self-Drilling Tek Screw
, Material: 410 Stainless Steel / Medium Carbon Steel
, Standards: DIN 7504-K / ISO 15480 / GB/T 15856.2
, Grade: 410 (High Hardness HV 400-500), 8.8-10.9 Grade Carbon Steel
, Specifications: M4.2 (#8), M4.8 (#10), M5.5 (#12), M6.3 (#14), Lengths from 13mm to 150mm
, Surface Treatment: Eco-friendly Black Zinc / Black Anodized Coating
, Design Features: Large flange disc for stress dispersion, cross-groove design for enhanced torque compatibility, high-hardness 410 self-drilling tip, matte black coating, and anti-slip high-engagement threads
, Applications: Ideal for dark-colored steel roofing, metal curtain walls, dark sheet metal enclosures, distribution cabinets, light steel keel systems, partition systems, outdoor black steel structure facilities, automotive repair, and vehicle modifications
, Delivery Time: 15-30 days after receiving advance payment
, Origin: China
, Brand: JGD
, Minimum Order Quantity: 10,000 pieces, negotiable
, Samples: Available for assessment
, Packaging: Available in boxed, bulk, pallet, or customized packaging options
, OEM Services: Custom manufacturing available through our reliable China factory
, Suppliers Source: Partner with us for high-quality products and competitive pricing.

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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
    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
    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
    Dual-Material Options
    Dual-Material Options – 410 Stainless Steel or Carbon Steel

    Available in 410 stainless steel (HV 400-500, high hardness, high driving torque, wear-resistant tip) and medium carbon steel (Grade 8.8-10.9, cost-optimized with reliable strength). 410 grade penetrates thick steel sheets and light-gauge studs without tip wear; carbon steel with black oxide coating offers corrosion resistance and cost-effectiveness.

    Eco-Friendly Coating
    Eco-Friendly Black Zinc/Black Oxide Coating

    Finished with eco-friendly black zinc or black oxide coating, delivering a uniform matte black finish that effectively resists moisture, salt spray, and industrial atmospheric corrosion. Strong adhesion with no chipping or peeling; color stays stable and rust-free outdoors. The dark appearance seamlessly blends with dark metal roofing and solar mounting systems.

    Large Flange Round Head
    Large Flange Round Head & Phillips High-Torque Drive

    The large flange round head increases bearing area, effectively preventing depression or cracking of thin panels; bottom anti-slip teeth bite into the substrate for vibration resistance. The Phillips drive fits standard tools, delivering high torque without cam-out, while the hardened self-drilling tip completes drilling, tapping, and fastening in one step.

    Factory Environment
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    High-Quality Stainless Steel Self-Tapping Screw Display
    Frequently Asked Questions
    What materials are available for these self-tapping screws?
    We offer two main options: 410 Stainless Steel for high hardness and corrosion resistance, and Carbon Steel (Grade 8.8-10.9) for cost-efficiency with reliable strength.
    How do the black coatings protect against corrosion?
    Our eco-friendly Black Zinc and Black Oxide coatings provide a matte finish that resists moisture, salt spray, and industrial atmospheric conditions, ensuring long-term rust protection.
    Can these screws be used on thick steel sheets?
    Yes, the 410 grade stainless steel screws are designed with a hardened tip to penetrate thick steel sheets and light-gauge studs without excessive wear.
    What are the benefits of the large flange round head?
    The large flange increases the bearing surface area, which prevents the screw from deforming or cracking thin panels and soft substrates during installation.
    Do you offer customization for specific project needs?
    Absolutely. We provide flexible customization for head shapes, slot types, special materials, extra-long specifications, and personalized packaging or labeling.
    How do you ensure the quality of each batch?
    We employ a full traceability system using furnace numbers, third-party material certifications, real-time salt spray monitoring, and fully automatic optical sorting.