100 Pcs 1/4"-20 Stainless Steel Concrete & Stone Drop in Female Expansion Anchors,1/4-20 Drop-in Concrete Expansion Anchor Drill Stainless Steel 304

Description If you are a construction worker, or work in the mechanical, construction, transportation, and other industries, and need to control the expansion rate and expansion range of concrete, then our expansion anchor will be one of your essential choices. Because of its excellent material, portable and lightweight structure, and excellent performance, it can become your good assistant in the work.How to Use1. You need to drill a hole of the right size.2. Then insert the anchor into the drilled hole.3. Then you need to insert the installation tool (not included) into the anchor bolt.4. The anchor is then tapped with a hammer to expand the anchor so that it can be embedded in the concrete.ApplicationIt is suitable for new energy, light industry, petrochemical industry, communication industry, marine industry, machining, medical machinery, construction industry, automotive manufacturing and bridge construction, and suitable for holes with a diameter of 0.307-0.315inch.SpecificationsMaterial: 304 Stainless SteelSurface Treatment: Brighten and DeburredMounting Type: Drop-inNumber of Pieces: 100Thread Size: 1/4-20''Product Outer Circle Diameter: 8mm/0.315inPerforation Diameter: 7.8-8mm/0.307-0.315inPackage Size: 11*10*3.5cm/4.3*3.9*1.3inchGross Weight: 0.8kg/1.76lbPackage Included100* Expansion AnchorsNotes1.These anchors should only be used in masonry and solid concrete, please do not use them for block or brick-based materials.2.They are typically used with mechanical screws, bolts, and threaded rods(none included).

• Sturdy and Durable：Made of high-quality 304 stainless steel, sturdy, wear-resistant, rust-proof, and impact-resistant, which can effectively protect the internal parts and prolong the service life.
• Drop-in Design：Our anchors feature a drop-in design,allowing for precise control of expansion rate and expansion range to meet different concrete elements and engineering requirements.
• Good Performance：This product adopts a heavy-duty anchoring system and internal thread, typically used in conjunction with machine screws, bolts, and screws to secure the fixing device to concrete and other masonry materials. Due to its design, it is also commonly used for temporary structures. It can effectively reduce the shrinkage stress and deformation of concrete while reducing energy consumption and improving engineering efficiency.
• Enough Quantity：100 expansion anchors in a package to meet your large-scale work needs at once.
• Cost Saving：Since expansion anchors are made of prefabricated concrete elements, and the anchor itself is always in concrete, the bolts you use to hold it in place can be removed and reused.