Heli-Coil R11851 12-24 Inserts/Pk 12 Price For: Each Application: For Metal Rockwell Hardness: C43-C50 Type: Free Running Helical Item: Helical Insert Thread Direction: Right Hand Tensile Strength (PSI): 200, 000 to 250, 000 Type: Free Running Helical Material: 304 Stainless steel Internal Thread Size: 12-24 Thread Type: UNC Length: 0.324" Free Coil Dia.: 0.276" Tap Sizes: 12-24 STI Drill Size: #1 Tensile Strength (PSI): 200, 000 to 250, 000 Country of Origin (subject to change): United States