The Φ48-51mm Expansion Bolt, specifically the Ordinary Expansion 8x90mm model, is a robust mechanical anchoring solution designed for heavy-duty applications in construction, industrial installations, and infrastructure projects. This Standard Expansion Anchor 8x90 features an 8mm diameter and 90mm length, compatible with pre-drilled holes of 48-51mm. It offers direct integration with structural components like steel beams, concrete slabs, and masonry walls without requiring additional modules. Engineered for environments with temperatures ranging from -30°C to +80°C, it provides high tensile strength (up to 25kN) and shear resistance (18kN) through its wedge-style expansion mechanism. Key advantages include corrosion-resistant zinc plating, rapid installation via hammer-drive activation, and adaptability to uneven surfaces. Limitations involve strict hole-size tolerance requirements and irreversible post-installation positioning. Ideal for securing heavy machinery, HVAC systems, and seismic reinforcements.

SEOSpecification

Parameter	Specification
Diameter Range	Φ48-51mm
Expansion Type	Ordinary Expansion Bolt
Thread Size	M8
Total Length	90mm
Material	Carbon Steel
Surface Treatment	Galvanized
Drill Bit Size	Φ12mm
Tensile Strength	10.8kN
Shear Strength	8.5kN
Application	Concrete/Masonry Anchoring
Standards	ISO 898-1, DIN 7998
Packaging Quantity	50 pcs/box

SEOQandA

question:Can the company provide upgraded or alternative models?
answer:Yes, we offer upgraded or alternative models. Contact our team for specific options.
question:Can I arrange self-pickup via official courier?
answer:Yes, self-pickup can be arranged. Notify us in advance to coordinate logistics.
question:Do you offer bulk order discounts?
answer:Bulk discounts are available. Contact sales for customized pricing based on quantity.

SEOQandA_Product

question:Difficulty inserting expansion tube into pre-drilled hole
answer:Check hole diameter (48-51mm) and remove debris. Use proper drilling tools.
question:Expansion tube not anchoring securely
answer:Ensure hole depth ≥90mm. Use in suitable materials; avoid brittle surfaces.
question:Tube breaks during installation
answer:Avoid excessive force. Verify material quality and use correct installation torque.
question:Mismatch between tube and fastener size
answer:Confirm bolt diameter matches 8mm specification. Use compatible fasteners.
question:Expansion tube slips under load
answer:Apply proper pre-tension. Ensure even load distribution and surface contact.