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.
A Carbon Steel Dyna Bolt (also called an expansion anchor bolt or sleeve anchor) is a mechanical fastener designed exclusively for securing objects to hard base materials like concrete, brick, and masonry. Its core mechanism relies on a expandable sleeve: when the bolt is tightened, the sleeve expands outward to grip the inner walls of a pre-drilled hole, creating a permanent, high-load connection.
Ideal for heavy-duty scenarios, our carbon steel dyna bolts are used in building construction (securing timber frames to concrete slabs), industrial settings (fastening machinery to factory floors), and commercial spaces (installing signage or handrails). They replace traditional anchors that fail under weight, offering unmatched stability for overhead fixtures like suspended ceiling grids.
Each dyna bolt consists of three key parts: a threaded carbon steel bolt, a cylindrical expandable sleeve (made from the same high-grade carbon steel), and a flat washer. The sleeve features pre-cut slots that allow it to expand uniformly – a visible design detail that distinguishes it from standard bolts. The bolt’s end is tapered, ensuring smooth sleeve expansion during installation.
To resist rust in harsh environments (e.g., outdoor concrete walls), our dyna bolts use zinc-plated or hot-dipped galvanized (HDG) finishes. The HDG variant has a thick, matte zinc layer (visible as a slightly rough texture), while zinc-plated bolts have a bright, smooth surface. Both options meet industrial corrosion resistance standards.
We offer UNC (imperial) and metric threads to fit global applications. Common sizes include M20 x 75mm (a hot-seller for medium-load tasks) and 19mm dyna bolts (for heavy machinery). The bolt’s length varies by use case – longer bolts for thick masonry, shorter ones for thin concrete panels.
| 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 |
Built from high-strength carbon steel, our dyna bolts withstand significant weight and lateral forces. For example, a standard M20 carbon steel dyna bolt can support up to 500kg of static load – making it ideal for securing heavy shelving or industrial ductwork.
The sleeve’s expansion creates a “press-fit” connection with the base material, eliminating loosening caused by vibration or temperature changes. Unlike adhesive anchors, this mechanical grip works immediately after installation, no curing time required.
While optimized for concrete and masonry, our dyna bolts also perform well in brick, stone, and even reinforced concrete. This versatility reduces the need for multiple fastener types on construction sites, cutting costs and simplifying inventory.
Despite their heavy-duty performance, carbon steel dyna bolts are easy to install: drill a matching-size hole, clean debris, insert the bolt through the fixture, and tighten with a wrench. No specialized training is needed – a team of two can install dozens of bolts in an hour.
The combination of carbon steel (high tensile strength) and zinc/HDG finishes (anti-rust) ensures a service life of 10+ years in outdoor or humid environments. This durability makes them a cost-effective choice for long-term construction projects.
Every dyna bolt undergoes rigorous testing: we check sleeve expansion uniformity (to ensure consistent grip), thread accuracy (for smooth tightening), and tensile strength (to verify load capacity). Only bolts that meet 100% of our standards are shipped.
Our products adhere to DIN, ANSI, and JIS standards – ensuring compatibility with tools and materials used in North America, Europe, and Asia. For example, ANSI-compliant dyna bolts fit American concrete drilling equipment, while DIN variants match European construction norms.
As a direct manufacturer, we control the entire production process: from sourcing high-purity carbon steel to final packaging. Our QA team (staffed with 5+ years of fastener expertise) conducts in-line checks to prevent defects like incomplete sleeve slots or uneven plating.
Yes, we are a direct manufacturer with our own production facilities and international sales department. We handle everything from raw material processing to shipping – no middlemen, so we offer competitive prices for bulk orders.
Absolutely. We offer customizations like non-standard thread sizes (e.g., special UNC variants), unique surface finishes (e.g., black oxide for aesthetic needs), and custom lengths (for oversized concrete slabs). Minimum order quantities (MOQ) depend on the customization complexity.
We implement a multi-stage quality control process: 1) Raw material inspection (testing carbon steel purity); 2) In-process checks (verifying sleeve slot accuracy and thread cutting); 3) Final testing (tensile load and corrosion resistance). All steps align with international standards.
For standard sizes (e.g., M20 x 75mm), the lead time is 20-30 days. For customized orders, lead time may extend slightly (based on production complexity), but we always provide a clear timeline before order confirmation.
For bulk production, we require a 30% deposit before manufacturing, with the remaining 70% paid against a copy of shipping documents. The most common payment method is T/T (Telegraphic Transfer), but L/C (Letter of Credit) is also accepted for large international orders.
