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

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Product 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: Available in sizes M4.2 (#8), M4.8 (#10), M5.5 (#12), M6.3 (#1with lengths ranging from 13mm to 150mm
, Surface Treatment: Environmentally Friendly Black Zinc / Black Anodized Coating
, Design Features: Featuring a large flange disc for effective stress dispersion, cross-groove for enhanced torque compatibility, high-hardness 410 self-drilling tint, matte black finish, and anti-slip high-engagement threads.
, Applications: Ideal for use in dark-colored steel roofing, metal curtain walls, dark sheet metal enclosures and distribution cabinets, light steel keel and partition systems, outdoor black steel structure facilities, as well as automotive repair and vehicle modifications.
, Delivery Time: 15-30 days upon receipt of advance payment
, Origin: China
, Brand: JGD
, Minimum Order Quantity: 10,000 pieces, negotiable
, Samples: Available upon request
, Packaging: Offered in Boxed, Bulk, Pallet, or customized packaging options
, OEM: Custom solutions available
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, As a leading China suppliers and factory of high-quality fasteners, we guarantee the excellence and durability of our Black Large Flange Phillips Self-Drilling Tek Screws, meeting industry standards to ensure reliability in various applications.

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    304 Stainless Steel Cross Recessed Countersunk Head Self-Tapping Screws01
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    304 Stainless Steel Cross Recessed Countersunk Head Self-Tapping Screws01

    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
    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. Dual-material range covers various budgets and working conditions – one screw, multiple applications.

    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, black sheet metal enclosures, solar mounting systems, and outdoor black steel structures.

    Large Flange Round Head

    Large Flange Round Head Stress Distribution + Phillips High-Torque Drive

    The large flange round head increases bearing area, effectively preventing depression, deformation, or cracking of thin panels or soft substrates during tightening; bottom anti-slip teeth bite into the substrate for vibration resistance. The Phillips drive fits standard screwdrivers and power 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 wear resistance, and Medium Carbon Steel (Grade 8.8-10.9) for cost-efficiency with reliable strength.
    Are the black coatings environmentally friendly?
    Yes, we use eco-friendly black zinc or black oxide coatings that provide excellent corrosion protection and a stable matte finish without chipping or peeling.
    What are the advantages of the large flange round head design?
    The large flange increases the bearing area, which prevents deformation or cracking in thin panels. It also features anti-slip teeth for better vibration resistance.
    Can I request custom head shapes or packaging?
    Absolutely. We provide flexible customization for head/slot shapes, extra large/long specifications, and personalized packaging and labeling to meet your specific needs.
    How do you ensure the quality of your fasteners?
    Our quality control system includes raw material source locking, full batch traceability, third-party certification, and real-time salt spray test monitoring.
    Do you provide technical support for installation?
    Yes, we offer on-site failure analysis, selection calculations, BOM optimization, and guidance on choosing the correct installation tools.