Expansion Bolts Grade 8.8 DIN Certified Heavy-Duty Anchors for Concrete and Brick Installation

Expansion bolts are essential fasteners widely used in structural concrete, masonry, and stone base materials. Their mechanical function lies in generating expansion pressure when the bolt is tightened, allowing it to grip the surrounding substrate with high stability. TAIMING, a professional manufacturer of precision fasteners, recommends DIN-certified expansion bolts made of carbon steel Grade 8.8 for critical-load applications such as steel structure connections, equipment foundations, and façade systems.

Unlike traditional anchors, expansion bolts provide dual resistance—mechanical friction and wedge expansion. This design is particularly advantageous when used in cracked concrete or overhead installations. TAIMING’s engineering team suggests using hot-dip galvanized or zinc-plated finishes for outdoor and high-humidity conditions, which improves corrosion resistance and ensures long-term reliability.

During field installation, proper hole depth and cleaning are vital to performance. For example, when using M12 expansion bolts in C25 concrete, TAIMING recommends a minimum embedment depth of 60mm to achieve consistent pull-out resistance above 12kN. In seismic or wind-prone zones, bolts with coarse metric threads are preferable for better torque control and vibration resistance.

TAIMING’s expansion bolts are manufactured under strict quality control with batch traceability, complying with DIN 985, ISO 898-1, and other international standards. We also offer custom lengths, head types, and surface treatments based on engineering requirements. Our technical support team works closely with OEM clients, offering pull-out test data and CAD drawings for specification submittals.

With growing infrastructure demands in Southeast Asia and North America, TAIMING continues to provide cost-effective, high-strength expansion bolt solutions for the global construction and MRO markets.