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High-Strength Hammer Drive Pin Expansion Anchor Bolts - China Suppliers & Factory for Concrete Fixation

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Product Name: High-Strength Hammer Drive Pin Expansion Through Anchor Bolt
, Material: Premium carbon steel or optional 304 stainless steel
, Standards: Compliant with ETAG 001 and GB/T 22795
, Grade: Available in Grades 5.8 and 8.8
, Sizes: Options include M8, M10, M12, M14, M16, M20, with lengths ranging from 60mm to 200mm
, Surface Treatment: Features an eco-friendly high-gloss yellow zinc or yellow zinc plating
, Design Features: This product incorporates a center pin hammer expansion mechanism, through-threaded design, an anti-slip flange nut, a bottom cross anti-slip drive groove, and exceptional shear and pull-out resistance. The bright zinc plating ensures long-lasting rust protection.
, Applications: Ideal for the installation of heavy machinery and equipment, steel structures, curtain wall frames, infrastructure projects, transportation facilities, large outdoor sunshades, protective structures, industrial plants, and warehouse racking.
, Delivery Time: Typically 15-30 days after advance payment
, Origin: Made in China
, Brand: JGD
, Minimum Order Quantity: 10,000 pieces; negotiable terms available
, Samples: Available upon request
, Packaging: Offered in boxed, bulk, pallet, or customized packaging
, OEM Services: Customization options are available
, Connect with top Suppliers from China and trust our Factory for high-quality anchor bolts that meet your project needs.

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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

    Our Core Advantages

    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
    • Mechanical Joint Laboratory
    Quality Control System

    Quality Control System

    • Raw Material Source Locking
    • Full Batch Traceability
    • Third Party Material Certification
    • Transparent Process Parameters
    • Salt Spray Real-Time Monitoring
    • International Standard Compliance
    Customization Capability

    Flexible Customization

    • Customizable Head/Slot Shapes
    • Special Material Applications
    • Extra Large/Long Specifications
    • Integrated Component Assembly
    • Custom Surface Treatment Colors
    • Personalized Packaging & Labeling

    Technical Innovation & Features

    Center Pin Hammer Expansion

    Center Pin Hammer Expansion – Through Anchoring

    Insert the anchor through the workpiece into the base material hole, strike the center pin – the bottom expansion petals open at the hole bottom, creating a through mechanical lock. No nut tightening or waiting – hammering completes anchoring instantly. The threaded through-section protrudes outside, allowing adjustable clamping force with the flange nut – ideal for steel structures and curtain wall frames requiring through-profile fixing.

    Flange Nut Self-Locking

    Flange Nut with Anti-Slip Self-Locking

    The matching flange nut features dense anti-slip ribs on the bottom face, biting into the workpiece surface during tightening to resist vibration and impact loosening. The threaded through-section offers ample adjustment margin – even with hole depth deviations, preload can be precisely adjusted via the nut. The bottom cross anti-slip drive slot supports emergency removal – easy maintenance, stays secure in heavy machinery and industrial racking.

    High-Strength Carbon Steel

    High-Strength Carbon Steel + Bright Zinc Plating

    Made of 5.8/8.8 grade high-quality carbon steel with high tensile strength, easily handling heavy equipment loads. Bright eco-friendly yellow/blue-white zinc plating provides dense, uniform corrosion protection against moisture, rain, and mild corrosive environments – suitable for outdoor awnings, infrastructure, and industrial plants. Integrally formed pins and expansion petals are hardened – withstand repeated hammering without cracking, and long-term cyclic loads without fatigue.

    Factory Environment

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    Stainless Steel Self-Tapping Screw Display

    Frequently Asked Questions

    What is the advantage of Center Pin Hammer Expansion?
    It allows for through-anchoring in one step. By striking the center pin, the anchor expands instantly at the bottom of the hole, eliminating the need for nut tightening or waiting during the initial set.
    How does the flange nut prevent loosening from vibration?
    The flange nut is designed with dense anti-slip ribs on the bottom face that bite into the workpiece surface, providing excellent resistance against impact and cyclic vibration.
    What materials and grades are used for these anchors?
    We use 5.8 and 8.8 grade high-quality carbon steel, which is then treated with bright yellow or blue-white zinc plating for superior weather and corrosion resistance.
    Can I customize the specifications for specific projects?
    Yes, we offer flexible customization for head shapes, slot types, extra large or long specifications, and even personalized packaging and labeling to meet industrial requirements.
    What kind of quality testing do your products undergo?
    Our products undergo rigorous testing including salt spray monitoring, micron-level thread inspection, and metallographic analysis in our joint laboratory to ensure international standard compliance.
    Are these anchors suitable for outdoor applications?
    Absolutely. With our bright eco-friendly zinc plating and high-strength carbon steel construction, they are ideal for outdoor awnings, infrastructure, and industrial plants exposed to moisture.