Knife Thread Insert System of Measurement Inch Insert Diameter 1/2 in Overall Length 1 in Internal Thread Size 5/16 In.-18 Thread Direction Right Hand Thread Type Coarse Material Brass Material Grade/Class C3604 Finish Plain Drive Type Slotted Drill Bit Size 33/64 in Compatible Material Wood Minimum Material Thickness 25/32 in Maximum Hole Diameter 0.516 in Minimum Installation Depth 21/32 in Tensile Strength 49 000 psi Package Quantity 10