The external expansion bolt (wedge expansion anchor) is made from bolt, expansion sleeve, wedge cone, washer and nut. Tightening the nut pulls the wedge cone into the sleeve, producing radial expansion and extrusion pressure to anchor in solid concrete, natural stone and dense brickwork.

Available in galvanized carbon steel and stainless steel grades and offered in a full range of metric sizes. Common applications include curtain walls, machinery mounting, guardrails and pipeline supports where medium and heavy load fixings are required. Product references standards GB/T 22795 and ETAG 001 — confirm material grade, finish and exact size when specifying.