Kara Square Flange Base 4-3/4"x 4-3/4" w/ 5/8"-11 Male Thread
Bored/ hollowed out holes on plate is separated by 3-5/8".
The Flange plate is .5" thick and would be great for mounting for permanent control.
Will fit most surveying instruments or accessories that can receive a 5/8"-11 Male Thread.
If you need a 3-1/2" Thread Adapter, click here