Hex head chemical anchor bolt, also known as chemical stud anchor. Supplied complete with hex nut and flat washer. The chisel tip breaks the glass capsule during installation, resin cures and bonds the stud firmly into concrete borehole. No expansion stress, can be installed near edge. Carbon steel grade 4.8/5.8/8.8 or stainless steel A2/A4. Surface: zinc plated, HDG. Sizes M8~M24. Widely used for curtain wall, steel base, handrail and heavy machinery fixing.