Helical Insert Helical Insert Type Free-Running System of Measurement Inch Overall Length 1/2 in Thread Size 1/4 In.-28 Thread Direction Right Hand Thread Type Fine Material Stainless Steel Material Grade/Class 18-8 Finish Plain Tang Style Tanged Compatible Material Metal Compatible Tap Size 1/4 In.-28 Drill Bit Size 17/64 in Maximum Hole Diameter 0.2113 in Tensile Strength 200 000 psi Outside Diameter 0.33 in Manufacturer Location Globally Sourced Rockwell Hardness C43-C50