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expansion bolt-0

Bolt

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Expansion Bolt

Expansion Bolt

Parameter Category Description
Thread Standard Metric (ISO): M6–M30; Imperial (UNC): 1/4"–1 1/4"
Material & Grade Bolt: Carbon steel Grade 8.8/10.9, Stainless steel 304/316; Sleeve: Carbon steel 
Surface Treatment Zinc-plated ; Hot-dip galvanizing; Passivation
Size & Load Capacity Bolt length: 50mm–500mm; Hole diameter: Matches sleeve size; Pull-out load: 5kN–80kN 
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Structural Features

Four key components: tapered high-strength bolt, split expansion sleeve, flat washer, hex nut. Tightening the nut expands the sleeve in pre-drilled masonry holes for locking. Two variants: wedge (heavy static loads), chemical (seismic/dynamic loads). Sleeve: carbon steel (corrosion coating); bolt: carbon/stainless steel.

Performance Advantages

High pull-out/shear resistance for heavy loads; easy installation (drill + wrench only); permanent fixation; various sizes; corrosion-resistant for indoor/outdoor/underground use.

Application Scenarios

Building facade brackets, HVAC pipelines, elevator guide rails, heavy machinery bases, construction scaffolding.

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