A Sleeve Anchor Fastener is a type of expansion anchor used for securing objects to concrete, brick, or masonry. It consists of a threaded bolt surrounded by a sleeve (usually made of metal) that expands when the bolt is tightened. As the bolt is tightened, the sleeve expands against the sides of the drilled hole, creating a strong grip that securely anchors the fastener in place. ... Sleeve anchors are commonly used in applications where a strong, durable attachment is needed without the requirement for heavy-duty or internal threading. They are widely used in construction, for mounting items such as shelving, signage, or machinery to concrete or brick surfaces. Sleeve anchors are available in various sizes and materials, such as zinc-plated steel, stainless steel, or other corrosion-resistant alloys, to suit different environmental conditions.