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Black Coated 410 Stainless Steel Tek Screws from China Suppliers | Factory Direct Self-Drilling Large Flange Fasteners

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Name: Black Large Flange Phillips Self-Drilling Tek Screw
Material: 410 Stainless Steel / Medium Carbon Steel
Standard: 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), Length 13mm - 150mm
Surface Treatment: Eco-Friendly Black Zinc / Black Anodized Coating
Design Features: Large flange disc for optimal stress dispersion, cross-groove for enhanced torque compatibility, high-hardness 410 self-drilling tip, matte black finish, anti-slip high-engagement threads
Applications: Ideal for 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: Boxed, Bulk, Pallet, or customized packaging options
OEM: Available
Suppliers and Factory: We are a trusted factory in China, supplying high-quality self-drilling tek screws suitable for diverse applications.

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    304 Stainless Steel Cross Recessed Countersunk Head Self-Tapping Screws01
    Contact us
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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.
    304 Stainless Steel Cross Recessed Countersunk Head Self-Tapping Screws01
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    304 Stainless Steel Cross Recessed Countersunk Head Self-Tapping Screws04

    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.
    Fastener cold heading machine
    Bolt Stamping Machine
    Dacromet process

    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.
    Fastener anti-loosening process
    Fastener testing equipment
    Intelligent Warehousing Services for Fasteners

    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

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    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
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    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
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    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
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    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
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    Feature 01

    Dual-Material Options – 410 Stainless Steel or Carbon Steel for Hardness or Cost Efficiency

    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.

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    Feature 02

    Eco-Friendly Black Zinc/Black Oxide Coating – Matte Finish, Corrosion Protection & Aesthetic Unity

    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 – no secondary painting needed, combining aesthetics and corrosion protection in one.

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    Feature 03

    Large Flange Round Head Stress Distribution + Phillips High-Torque Drive – Flush Installation & Anti-Loosening

    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. Anti-slip high-bite threads ensure long-term load retention without loosening – ideal for steel roofing, electrical cabinets, and light-gauge steel framing.

    Factory Environment

    304 Stainless Steel Cross Recessed Countersunk Head Self-Tapping Screws01
    304 Stainless Steel Cross Recessed Countersunk Head Self-Tapping Screws02
    304 Stainless Steel Cross Recessed Countersunk Head Self-Tapping Screws03
    304 Stainless Steel Cross Recessed Countersunk Head Self-Tapping Screws04
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    High-Quality Stainless Steel Self-Tapping Screw Display

    Frequently Asked Questions

    1. What materials are available for your self-tapping screws?
    We offer dual-material options: 410 stainless steel, which has a high hardness (HV 400-500) and excellent wear resistance for penetrating thick metal sheets, and medium carbon steel (Grade 8.8-10.9), which provides reliable strength and structural cost efficiency.
    2. How does the eco-friendly black coating protect the screws?
    Our screws feature an eco-friendly black zinc or black oxide coating. This treatment offers a uniform matte finish that effectively resists moisture, salt spray, and atmospheric corrosion, ensuring the screws remain rust-free without chipping or peeling.
    3. What are the benefits of the large flange round head design?
    The large flange round head increases the bearing surface area, distributing physical stress evenly. This prevents deformation or cracking in thin panels or soft substrates. Additionally, bottom anti-slip teeth provide superior vibration resistance.
    4. Do you offer customization options for special project needs?
    Yes, we have flexible customization capabilities. We can customize head and slot shapes, manufacture screws with extra-large or extra-long specifications, apply special materials, and offer personalized surface treatment colors and custom packaging.
    5. How do you ensure the quality of your fasteners?
    Our quality control system locks raw material sources and ensures full traceability with furnace batch numbers. We also provide third-party material certifications, real-time salt spray monitoring, and perform strict testing in our metallographic joint laboratory.
    6. Can I get free samples of your self-tapping screws?
    Yes, as part of our technical services, we offer free sample making and testing to help you verify the fit, performance, and compatibility of our screws before placing a bulk order.