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Heavy Duty Expansion Sleeve Anchor Bolts - China Suppliers & Factory for Concrete Construction Fastening

Product Name: Sleeve Anchor Bolt (also known as Sleeve Anchor Bolt / Expansion Sleeve Anchor)
Material Options: Crafted from high-quality AISI 304 Stainless Steel (known for its corrosion resistance and rust-proof properties) and Q235 Carbon Steel
Industry Standards: Manufactured in compliance with GB/T 22795, ETAG 001, and ASTM F1554
Grade Options: Available in .8 grade and 8.8 grade for carbon steel, and A2-70 (30/ A4-80 (31for stainless steel variants
Specifications: Sizes range from M6 to M24, with customization available to meet specific requirements
Surface Finishing: Carbon steel options feature a zinc-plated finish (offered in color zinc and blue-white zinc), while stainless steel options come polished or hot-dip galvanized
Key Design Features: Unique sleeve expansion structure, anti-slip knurled sleeve, extensive specification range, multiple material choices, and straightforward installation process
Applications: Ideal for building construction, equipment installation, municipal engineering, outdoor facilities, and general assembly projects
Delivery Time: Fast shipping within 15-30 days upon receipt of advance payment
Place of Origin: China
Brand: JGD
Minimum Order Quantity: 10,000 pieces with negotiable terms
Samples: Available upon request
Packaging Options: Supplied in boxed, bulk, pallet, or customized packaging
OEM Services: Tailored solutions available to meet unique customer 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

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

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

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

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

Premium Selection

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.

Advanced 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.

High Efficiency

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

High-Quality Sleeve Anchor Bolt Display

Frequently Asked Questions

What materials are available for your sleeve anchor bolts?

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 can be treated with color zinc, blue-white zinc, or hot-dip galvanized finishes for superior rust resistance.

What are the main advantages of the knurled sleeve design?

The knurled sleeve design provides a non-slip textured surface that significantly increases friction against concrete or brick substrates. This design prevents anchor rotation and slip under load, providing excellent vibration resistance.

Do these anchors require pre-embedding during construction?

No, they are pre-embedded-free. You simply drill a hole, clean it out, insert the anchor directly through the fixture, and tighten the nut. This saves significant labor cost and construction time.

What standard specifications do your heavy-duty anchors meet?

Our sleeve anchor bolts are manufactured strictly in compliance with international GB/T 22795 and European ETAG 001 standards, ensuring high mechanical performance and safety margins.

Can you customize the sizes and head shapes of the anchors?

Yes, we offer fully customizable services. We can customize the head/slot shapes, manufacture extra large or extra long specifications, and provide specialized surface treatments according to your project requirements.