A Dynabolt is a type of sleeve anchor used to fasten objects to concrete or masonry surfaces. It's a mechanical expansion fastener that provides a secure hold by expanding inside a pre-drilled hole. Dynabolts are known for their strength, durability, and ability to withstand heavy loads.
The Carbon Steel Dyna Bolt (frequently referred to as a heavy-duty expansion anchor or sleeve anchor) serves as a critical mechanical fastening solution engineered specifically for anchoring heavy structural elements to solid base materials such as cured concrete, solid brick, and dense masonry. The core functionality relies on a precision-engineered expandable sleeve. As the hex nut is torqued, the tapered cone is pulled into the sleeve, forcing it to expand outward. This action creates immense frictional grip against the inner walls of a pre-drilled hole, resulting in a permanent, vibration-resistant connection capable of sustaining massive shear and tensile loads.
Ideal for demanding load-bearing scenarios, these anchors are the definitive choice for commercial building construction, securing timber sole plates to concrete slabs, fastening heavy industrial machinery to factory floors to prevent walking, and installing critical overhead fixtures like suspended ceiling grids or structural steel brackets. By replacing traditional adhesive anchors that require strict temperature controls and lengthy curing times, this mechanical expansion bolt offers immediate load capacity and unmatched stability, keeping your project timelines strictly on track.
Each unit comprises three precision-machined elements: a threaded carbon steel stud with a flared cone end, a cylindrical expandable sleeve, and a flat washer paired with a hex nut. The sleeve itself features strategically pre-cut expansion slots that are visibly crisp and free of metal burrs. When handled, the bolt feels substantial and weighty, reflecting its dense metallic composition. The tapered cone is engineered with a smooth gradient, ensuring that the sleeve expands uniformly rather than binding or catching during the torquing process.
We offer multiple surface treatments to match specific environmental exposures. For indoor or dry environments, the bright zinc-plated finish provides a smooth, reflective silver surface that effectively resists mild oxidation. For aggressive outdoor environments or marine-adjacent construction, the hot-dipped galvanized (HDG) variant is strongly recommended. The HDG finish presents a thick, matte grey layer with a slightly textured, crystalline surface—a visual indicator of its heavy-duty zinc coating that physically blocks moisture and prevents rust propagation over decades of use.
To accommodate global engineering specifications, these anchors are machined with exacting thread tolerances in both UNC (imperial) and metric profiles. Running a nut along the threads produces a smooth, consistent rotational feel, indicating precise thread pitches. Popular configurations include the heavy-duty M20 x 75mm, frequently specified for medium-load structural brackets, and robust 19mm diameter variants for securing vibrating industrial equipment. Lengths are fully scalable, allowing you to select shorter profiles for shallow embedment in thin concrete panels or extended lengths for penetrating thick masonry walls.
| Product name | hot dipped galvanized dynabolt anchor bolts |
| Standard | DIN & ANSI & JIS & IFI |
| Thread | unc,unf,metric thread |
| Material | carbon steel, alloy steel, stainless steel |
| Finish | Zinc Plated, HDG ,Black ,Bright,GOEMET |
| Packing | bulk in cartons (25kg Max.)+wood Pallet or according to customer special demand |
| Leading Time | 20-30 days or based on order required |
Manufactured from premium-grade carbon steel, these mechanical fasteners are engineered to withstand extreme static weights and dynamic lateral forces. We provide comprehensive pull-out and shear force testing reports, alongside detailed engineering design parameters, to support your structural calculations and facilitate rapid project approvals. For instance, a standard M20 anchor demonstrates a static load-bearing capacity of up to 500kg in standard 30MPa concrete. This immense holding power makes it the definitive choice for securing heavy pallet racking, industrial ductwork, and structural steel columns where failure is simply not an option.
The mechanical expansion design creates an aggressive "press-fit" interlock with the host material. As torque is applied, the sleeve bites into the concrete pores, forming a connection that actively resists loosening from ambient building vibrations or sudden temperature fluctuations. Unlike chemical epoxies that require strict environmental controls and hours to cure before bearing weight, this mechanical grip delivers immediate, full-rated load capacity the second the nut is properly tightened.
These anchors are highly adaptable across a spectrum of challenging substrates. While engineered primarily for solid concrete, they deliver exceptional holding power in solid brick, hollow blocks, natural stone, and reinforced masonry. We supply detailed anchoring guidelines tailored for specific trades—whether you are a carpenter framing timber walls, a glazier installing heavy curtain wall facades, or a warehouse contractor erecting heavy-duty storage racks. This single fastener type simplifies your procurement process and drastically reduces on-site inventory complexity.
The installation workflow is designed for maximum efficiency, requiring minimal specialized training. Simply drill a hole using a standard carbide-tipped masonry bit, clear the concrete dust with a blowout bulb, insert the anchor through the fixture, and apply torque with a standard wrench. To further minimize installation errors on large-scale sites, we provide visual installation videos and illustrated operation manuals, ensuring your framing crews can consistently install dozens of anchors per hour with perfect accuracy and reduced fatigue.
The synergy of high-tensile carbon steel and industrial-grade surface coatings guarantees a prolonged operational lifespan. When deployed in exterior walls or humid industrial facilities, the protective zinc or HDG layers act as a sacrificial barrier, preventing structural degradation. This proven durability translates to a reliable service life exceeding a decade in demanding environments, drastically reducing future maintenance overhead and replacement costs for facility managers and property owners.
Quality is verified at a granular level before any batch leaves our facility. Every production run is subjected to rigorous mechanical evaluations. We physically test the uniform expansion of the sleeves to guarantee a consistent radial grip, verify thread pitch accuracy with go/no-go gauges for frictionless nut engagement, and conduct destructive tensile strength testing to validate maximum load ratings. Only components that pass this exhaustive 100% inspection protocol are cleared for global dispatch.
Our manufacturing tolerances strictly adhere to DIN, ANSI, and JIS international specifications, ensuring compatibility with regional construction practices and tooling. Furthermore, we actively support comprehensive factory audits and pre-shipment inspections by internationally recognized third-party organizations such as SGS or TUV. We back our hardware with clear warranty periods and a structured after-sales claim mechanism, giving procurement officers complete confidence during strict project handovers.
Operating as a primary manufacturer, we maintain absolute control over the production lifecycle. Our process utilizes precision CNC machining and advanced heat-treatment protocols to optimize the steel's mechanical properties. To ensure complete lifecycle accountability, we implement laser-etched batch coding on our packaging, allowing full traceability from raw steel ingots to the finished fastener. Our dedicated QA engineers monitor the line continuously to eliminate defects like uneven plating or malformed expansion slots.
Yes, we operate as a primary manufacturing facility equipped with advanced machining centers and an in-house international trade department. By managing the entire value chain—from sourcing raw carbon steel billets to final assembly and global logistics—we eliminate intermediary markups. This direct-to-buyer model allows us to offer highly competitive pricing structures for large-scale procurement and structural engineering firms.
We specialize in engineering bespoke fastening solutions tailored to unique project requirements. Our capabilities include manufacturing non-standard thread pitches, extended bolt lengths for oversized concrete slabs, and specialized surface treatments like black oxide for low-visibility architectural applications. Minimum order quantities for custom runs are evaluated based on tooling requirements, and our engineering team will provide detailed specifications for your approval prior to production.
Our quality management system is a multi-tiered framework. It begins with metallurgical testing of incoming raw steel to verify carbon content and tensile properties. During production, automated optical sorting machines and manual spot checks ensure dimensional accuracy of the sleeve slots and threads. Finally, batch samples undergo salt-spray corrosion testing and extreme load-bearing simulations, guaranteeing consistent performance across every order.
For standard dimensions like the M20 x 75mm, typical production turnaround is 20 to 30 days. To guarantee zero loss during cross-border transit, we utilize customized, moisture-resistant inner packaging and reinforced branded outer cartons. These are securely strapped to high-strength, fumigation-free wooden pallets, ensuring your bulk inventory arrives in pristine condition, ready for immediate site deployment regardless of the shipping distance.
To initiate bulk manufacturing, we require a standard 30% telegraphic transfer (T/T) deposit, with the remaining 70% balance settled against the transmission of final shipping documents (Bill of Lading). For exceptionally large international infrastructure projects, we are fully equipped to process irrevocable Letters of Credit (L/C) at sight, providing financial security and flexibility for global procurement teams.
