Helical Insert Helical Insert Type Screw-Locking System of Measurement Inch Overall Length 7/64 in Thread Size #4-40 Thread Direction Right Hand Thread Type Coarse Material Stainless Steel Material Grade/Class 18-8 Finish Plain Tang Style Tangless Compatible Material Metal Compatible Tap Size #4-40 Drill Bit Size #31 Maximum Hole Diameter Not Applicable Tensile Strength 200 000 to 250 000 psi Outside Diameter 0.152 in Manufacturer Location Made in USA Rockwell Hardness C43-C50