Heli-Coil R11917 7/16-20 Inserts/Pk 6 Price For: Each Meets/Exceeds: - Thread Type: UNF Rockwell Hardness: C43-C50 Item: Helical Insert Thread Direction: Right Hand Application: For Metal Type: Free Running Helical Tensile Strength (PSI): 200, 000 to 250, 000 Tap Sizes: 7/16-20 STI Internal Thread Size: 7/16-20 Drill Size: 29/64" Material: 304 Stainless Steel Length: 0.656" Free Coil Dia.: 0.537" Country of Origin (subject to change): United States