ASTM A325 Heavy Hex Structural Bolts
Standard: A325, A325M
Sizes: M12 to M64
Surface: HDG, Black, Zinc, Dacromet, Geomet
Grade: 8.8, A325, A490
A325M Heavy Hex Bolt is a metric, high-strength structural bolt conforming to ASTM A325M specification. It features a heavy hex head (larger than a standard hex head) for increased bearing surface and wrench engagement. Typically used in steel-to-steel structural connections, it offers high tensile strength (approximately 830–1040 MPa, depending on property class, e.g., Class 8.8 or 10.9 equivalent). Common surface finishes include plain, hot-dip galvanized, or mechanically galvanized for corrosion resistance. It is often paired with a heavy hex nut and washers for pre-tensioned bolting applications in bridges, buildings, and other heavy steel structures.
Why Choose Our High Tensile Hex Bolts HDG Grade 8.8?
Superior Tensile Strength
With a minimum tensile strength of 830 MPa and a yield strength of 640 MPa, our Grade 8.8 hex bolts are engineered to handle heavy duty and high stress applications in construction, infrastructure, oil and gas and industrial projects across the UAE.
Hot-Dip Galvanized (HDG) Coating
Built to withstand the harsh climatic conditions of the UAE, our hex bolts feature a hot-dip galvanized coating that provides exceptional corrosion resistance. This ensures long-lasting performance, even in high humidity, high temperature and saline environments.
Precision Engineering
Every bolt is crafted to exacting DIN or ISO standards, ensuring consistent thread accuracy, smooth installation and reliable performance in critical applications. Whether you are working on skyscrapers in Dubai or industrial facilities in Abu Dhabi, our hex bolts are engineered with reliable performance to serve the projects.
Perfect Bolts and Nuts Assembling
Each set of high tensile hex bolts and nuts assemblies manufactured by Fastenwell are perfectly match with each other, tightly and no vibrating allowed. Which makes the entire bolt and nut assembly ideal for applications which require perfectly matching for high tensile hex bolts and nuts, and offering reliable performance even in demanding environment.
