' Helical Insert, Free Running, 304 Stainless Steel, Internal Thread Size 5/8-18, UNF Thread Type, Right Hand Thread Direction, Length 0.625", Free Coil Dia. 0.758", Tap Sizes 5/8-18, Drill Size 41/64", Tensile Strength (PSI) 200, 000, Rockwell Hardness C43-C50, Application For Metal, Package Quantity 5 '