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China Suppliers Factory 410/304 Stainless Steel Countersunk Self-Drilling Screws, Phillips Flat Head Self-Tapping Fasteners

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Name: Stainless Steel Countersunk Phillips Self-Drilling Tek Screw
Material: 410 Stainless Steel / 304 Stainless Steel
Standard: DIN 7504P / ANSI / ASME
Grade: 410 (high hardness, high self-drilling torque); 304 (A2-70)
Sizes: M3.5, M4.2, M4.8, M5.5, M6.3 (American Standard #6, #8, #10, #12, #14), Length: 13mm to 120mm
Surface Treatment: Electropolished / Passivation Treatment
Design Features: Our self-drilling screws are designed for efficiency, eliminating the need for pre-drilling. The countersunk head ensures a seamless fit, while the dual material options of 410 and 304 stainless steel provide exceptional durability. The screws feature tight threaded anti-slip interlocking and mirror passivation to prevent rust.
Applications: These versatile screws are ideal for light steel keel and steel structure ceilings, furniture and sheet metal assembly, installation of metal doors, windows, and curtain walls, as well as in automobile and vehicle manufacturing. They are also perfect for outdoor advertising and signage applications.
Delivery Time: 15-30 days after receiving advance payment
Origin: China
Brand: JGD, a trusted manufacturer
Minimum Order Quantity: 10,000 pieces, negotiable
Samples: Available upon request
Packaging: Options include Boxed, Bulk, Pallet or customized packaging
OEM: Available, allowing for tailored solutions from our factory

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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

    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
    Stainless Steel Options

    Dual Stainless Steel Options – High Hardness or Superior Corrosion Resistance

    Available in 410 and 304 stainless steel. 410 grade, heat-treated for high hardness, delivers high driving torque to penetrate thick steel sheets and light-gauge studs without tip wear or breakage; 304 grade (A2-70) offers excellent corrosion resistance for damp, salt-spray, and outdoor environments – rust-free for decades.

    Self-Drilling Tip

    Self-Drilling Tip – No Pre-Drilling, Efficient One-Step Installation

    The built-in self-drilling tip penetrates light-gauge steel, thin metal sheets, aluminum profiles, and sheet metal directly – no pre-drilling or punching needed. An electric driver completes drilling, tapping, and fastening in one step – several times faster than conventional self-tapping screws.

    Countersunk Flat Head

    Countersunk Flat Head – Flush Fit, Aesthetic & Non-Interfering

    The countersunk flat head fully embeds into the workpiece surface, sitting flush with metal panels, profiles, or curtain walls – no protrusion, sleek appearance, and no interference with subsequent painting, film application, or decorative finishing.

    Factory Environment

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    High-Quality Stainless Steel Self-Tapping Screw Display

    Frequently Asked Questions

    Q1: What are the differences between 304 and 410 stainless steel screws?
    A: 410 stainless steel is heat-treatable for high hardness, making it ideal for penetrating thick steel sheets. 304 stainless steel offers superior corrosion resistance, making it perfect for damp or outdoor environments where rust prevention is critical.
    Q2: Do these screws require pre-drilling?
    A: No, our self-drilling tip design allows for one-step installation. It can penetrate light-gauge steel, aluminum, and sheet metal directly without the need for pre-drilling or punching.
    Q3: Are the screw heads flush after installation?
    A: Yes, the countersunk flat head design allows the screw to sit flush with the surface, providing a sleek appearance without any protrusions.
    Q4: Can I request customized packaging or labeling?
    A: Absolutely. We offer personalized packaging and labeling services, along with customizable head shapes, slot types, and surface treatment colors to meet your specific needs.
    Q5: How do you ensure the quality of your fasteners?
    A: We implement a strict quality control system including raw material source locking, full batch traceability, third-party certification, and real-time monitoring of salt spray tests.
    Q6: What technical support do you provide?
    A: We offer on-site failure analysis, BOM optimization, installation tool selection guidance, free sample making, and inventory management (VMI) services.