Representative Image Heli-Coil SAE Thread Repair Kit - 5528-5 Part #: 5528-5 Line: HEL Heli-Coil SAE Thread Repair Kit Manufacturer's Defect Warranty Material: Stainless Steel Quantity: 12 Thread Direction: Clockwise Length (in): 1/2 Inch Length (mm): 11.912mm Drill Size: 21/64 Inch SAE Or Metric: SAE Drill Bit Included: No Internal Thread Size: 5/16-24 Inch Rockwell Hardness: 43-50 Tap Included: Yes Tensile Strength (psi): 200,000 To 250,000 psi Show More Show Less