Recoil Thin Wall Key Locking Insert, Style: Locking, Unit of Measure: Metric, M8 x 1.25 Internal Thread, 6H Internal Thread Class, M12 x 1.25 External Thread, 6G External Thread Class, Body Material Detail: C1215 Steel with 302 Stainless Steel Keys Material, Finish Detail: Zinc Phosphate and Ferrocote 364-3 Oil, 12 mm Body Length,Recommended Installation BA- 72312, Tap Drill Size: 10.80 mm, 12.25 mm Counter Sink Diameter, M12 x 1.25 Thread Tap Size, 6H Thread Tap Class, 13.50 mm Min Thread Tap Depth, 9.50 mm Removal Drill Size, 4-3/4 mm Removal Drill Depth