Knife Thread Insert System of Measurement Inch Insert Diameter 1/4 in Overall Length 3/8 in Internal Thread Size #4-40 Thread Direction Right Hand Thread Type Coarse Material Stainless Steel Material Grade/Class 18-8 Finish Plain Drive Type Slotted Drill Bit Size 17/64 in Compatible Material Wood Minimum Material Thickness 13/32 in Maximum Hole Diameter 0.266 in Compatible with Manufacturer Model Number 500-004 Installation Method Drive Tool Screwdriver