Rod Hanger System of Measurement Inch Mount Type Vertical Screw Size 1/4 in Overall Length 2 9/64 in Material Steel Finish Zinc Plated Drive Type Socket Compatible Material Concrete Compatible Rod Thread Size 1/4 In.-20 Drill Bit Size 1/4 in Minimum Material Thickness 3 1/4 in ICC Approved for Cracked Concrete Yes ICC Approved for Un-Cracked Concrete Yes Seismic Approved Yes Anchor Diameter 1/2 in Body Length 1 5/8 in Color Silver