Helical Insert Helical Insert Type Free-Running System of Measurement Inch Overall Length 25/64 in Thread Size 1/4 In.-18 Thread Direction Right Hand Thread Type ANPT Material Stainless Steel Material Grade/Class 18-8 Finish Plain Tang Style Tanged Compatible Material Metal Compatible Tap Size 1/4 In.-18 Drill Bit Size 31/64 in Maximum Hole Diameter Not Applicable Tensile Strength 200 000 to 250 000 psi Outside Diameter 0.668 in Manufacturer Location Made in USA