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