Quarter 20 to Action Camera Adapter.  This is a Two Tang Action Camera to ¼-20 Male Thread Adapter.  Includes the Jam Nut.  This connector is Extremely Strong, and still Flexible enough to lock up Really Tight.   Highest Quality.
 
We have a decade of experience developing metal camera adapters.  These adapters look different than other metal  adapters because they are different.  Our solid metal adapters lock up tight, ready for battle.  The longer thinner tines deliver the strength of metal and still provide the flexibility required to be able to lock everything down with a thumb screw.  
 
Part of our charter is to facilitate the flexible use of different cameras and phones.  An adapter like this can allow an old mount to support a new camera or cellphone.  One more trick in the bag for Photographers.