Hex Drive Threaded Insert System of Measurement Inch Insert Diameter 35/64 in Overall Length 33/64 in Internal Thread Size 5/16 In.-18 Thread Direction Right Hand Thread Type Coarse Material Zinc Alloy Material Grade/Class Zamak 3 Finish Plain Drive Size M8 Drill Bit Size 7/16 in Compatible Material Wood Minimum Material Thickness 21/32 in Maximum Hole Diameter 0.438 in Flange Style Flush Compatible Manufacturer Model Number 9100 Features Broad External Thread