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Heavy Duty Sleeve Anchor Bolts for Concrete - China Factory Suppliers, Stainless & Galvanized Options Available

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Product Name: Sleeve Anchor Bolt (Sleeve Anchor Bolt / Expansion Sleeve Anchor)
, Material: AISI 304 Stainless Steel (Corrosion Resistant, Rust-Proof), Q235 Carbon Steel
, Standards: GB/T 22795, ETAG 001, ASTM F1554
, Grade: .8 grade / 8.8 grade (carbon steel), A2-70 (30/ A4-80 (316)
, Specifications: M6-M24 (customizable)
, Surface Treatment: Zinc-plated (color zinc / blue-white zinc) for carbon steel, hot-dip galvanized, polished/passivated for stainless steel
, Design Features: Innovative sleeve expansion structure, anti-slip knurled sleeve, full specification coverage, multiple material options, easy installation
, Applications: Ideal for building construction, equipment installation, municipal engineering, outdoor facilities, and general assembly
, Delivery Time: 15-30 days after receiving 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 for tailored solutions
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, Looking for reliable China suppliers? Our Sleeve Anchor Bolts are produced in a state-of-the-art factory, ensuring high quality and durability. Explore our customizable options to meet your specific needs!

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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
    Customization Capability

    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
    Dual-Material Options

    Dual-Material & Full-Size Options for Durability in All Conditions

    Our sleeve anchors are available in Q235 carbon steel (grades 4.8/8.8) and AISI 304/316 stainless steel (A2-70/A4-80). Carbon steel versions with color zinc, blue-white zinc or hot-dip galvanized finishes offer excellent rust and wear resistance, while polished and passivated stainless steel provides natural corrosion resistance for coastal and humid environments. Sizes range from M6 to M24 with customizable lengths, meeting diverse strength and anti-corrosion needs for construction, equipment installation and municipal guardrails.

    Knurled Sleeve Design

    Knurled Sleeve + Expansion Anchoring for Secure, Slip-Resistant Grip

    Featuring a non-slip knurled sleeve expansion design, the sleeve is evenly expanded against the concrete or masonry wall by the cone head when tightening the nut, forming a high-strength mechanical lock. The knurled surface significantly increases friction with the base material, effectively preventing anchor slip under load and offering excellent vibration resistance. Manufactured to GB/T 22795 and ETAG 001 standards, they are designed for solid concrete and brick substrates, providing stable performance with sufficient safety redundancy in curtain wall and heavy equipment installation applications.

    Quick Installation

    Pre-Embedded-Free Quick Installation for High Efficiency & Versatility

    Installation is simple and efficient: just drill, clean the hole, insert the anchor and tighten the nut—no pre-embedding required, greatly reducing construction time and labor costs. The design is highly adaptable to a wide range of applications, including building curtain walls, municipal guardrails, equipment installation, outdoor facilities and general mechanical assembly. With complete specifications and custom service available, they quickly meet various on-site construction needs with strong versatility.

    Application Scenarios

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    High-Quality Sleeve Anchor Bolt Display

    Frequently Asked Questions

    What materials are available for your sleeve anchor bolts?
    We offer anchors in Q235 carbon steel (grades 4.8 and 8.8) and high-grade AISI 304/316 stainless steel to suit different strength and environmental requirements.
    Which surface treatments provide the best corrosion resistance?
    For extreme environments, hot-dip galvanized carbon steel or polished/passivated stainless steel (316) are recommended for superior rust and corrosion protection.
    Can these anchors be used in hollow bricks?
    Our sleeve anchors are primarily designed for solid concrete and solid masonry. For hollow materials, please contact our technical team for specific selection guidance.
    Are custom sizes and head shapes available?
    Yes, we provide flexible customization for head/slot shapes, extra-long specifications, and specific material requirements to meet your unique project needs.
    What standards do your products comply with?
    Our manufacturing process follows international standards including GB/T 22795 and ETAG 001, ensuring high performance and safety redundancy.
    How does the knurled sleeve improve performance?
    The knurled surface increases friction against the hole wall, preventing the anchor from slipping and providing excellent stability under vibration or heavy loads.