304 Stainless Steel - Corrosion & Rust ResistantIncludes Nuts and WashersUsed to secure material and equipment to concrete masonry surfacesAlso known as Thru Bolts, Stud Anchors, Concrete Bolts and Wedge BoltsInstalled into a pre-drilled hole, then the wedge is expanded by tightening the nut to securely anchor into the concrete Concrete Wedge Anchor Bolts are used to install or fasten to concrete such as equipment, materials, generators, motors, pumps, pipes, strut, steel shapes, railing, benches, plastics or wood members. Wedge Anchors are installed into drilled holes, most often in concrete or other masonry materials. The non-threaded end is embedded into the hole and then struck to activate the expansion mechanism, which is fully utilized as the nut is tightened over the washer on the outside of the surface, on the material being fastened. The majority of the wedge anchor remains embedded in the solid masonry material being fastened to. How to Install Concrete Wedge Anchors Insert Into Pre-Drilled Hole The first step is to insert the wedge anchor into a pre-drilled hole (or drill the hole into the masonry material). The hole should be the same diameter as the wedge anchor. Hit with a hammer until the desired embedment depth is reached. Add the Material The next step is to add the equipment or material that you would like to anchor to the concrete over the exposed threaded portion of the bolt. Next add the washer and then the nut. Tighten the Nut This is the important part. Using a wrench or socket, tighten the nut. This pulls the threaded portion of the bolt up through the wedge mechanism at the bottom of the anchor, which expands and embeds into the concrete and anchors the material to the concrete, brick or block. Finished Application After the nut is tightened and the wedge has embedded into the masonry surface, the material you are anchoring should have a tight fit and be resistant to pulling out of the initial hole. Wedge anchors provide one of the strongest holds of all masonry anchors and are used in a wide variety of applications. Stainless Steel Wedge Anchors Stainless Steel Wedge Anchors in this selection are made of grade 304 Stainless Steel which is corrosion and rust resistant making it suitable for long lasting applications and those exposed to the elements.