Expansion Anchor Anchor Diameter 1/4 in Overall Length 1 in Thread Size 1/4 In.-20 Thread Depth 0.44 in Thread Type Coarse Material Steel Finish Zinc Plated Flange Style Flush Drill Bit Size 3/8 in Minimum Hole Depth 1 in System of Measurement Inch Bolt or Rod Size 1/4 in Material Grade/Class 1008 Compatible Material Concrete Removable Removable Manufacturer Location Globally Sourced Features Can Be Installed Flush Mounted or Below The Base Material Surface