Product Details:Material: Carbon SteelPre-drilled Hole Diameter: 11.9mm/0.47"Outer Diameter: 12mm/0.47"Thread Inner Diameter: 10mm/0.39"Total Length: 40mm/1.57"Package Contents: 50pcs x Expansion BoltMaterial - Made of carbon steel material, hard and durable. It has good anti-rust and anti-corrosion properties, has excellent load-bearing capacity, and can be used for a long time.Feature - Good workmanship, the surface of the expansion bolt is smooth and burr-free, the threads are neat and clear, the force is even, and it is not easy to slide.Application - These expansion bolts are generally used to fasten guardrails, awnings, air conditioners, etc. on concrete, bricks, and other materials.
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