Heli-Coil SAE Thread Repair Kit - 5528-8 Part #: 5528-8 Line: HEL Heli-Coil SAE Thread Repair Kit Manufacturer's Defect Warranty Material: Stainless Steel Quantity: 6 Thread Direction: Clockwise Length (in): 3/4 Inch Length (mm): 19.05mm Drill Size: 33/64 Inch SAE Or Metric: SAE Drill Bit Included: No Internal Thread Size: 1/2-20 Inch Rockwell Hardness: 43-50 Tap Included: Yes Tensile Strength (psi): 200,000 To 250,000 psi Show More Show Less