Recoil Heavy-Duty Key Locking Insert, Style: Locking, Unit of Measure: Inch, 3/4-10 Internal Thread, 3B Internal Thread Class, 1-1/8-12 External Thread, 2A External Thread Class, Body Material Detail: 303 Stainless Steel with 302 Stainless Steel Keys Material, Finish Detail: Passivated, 1.12 Inch Body Length, Recommended Installation BA-72875, Tap Drill Size: 1-1/16 Inch, 1.14 Inch Counter Sink Diameter, 1-1/8-12 Thread Tap Size, 2B Thread Tap Class, 1.31 Inch Min Thread Tap Depth, 31/32 Inch Removal Drill Size, 5/16 Inch Removal Drill Depth