Same as a Remington 700 as I recall ( ÂĽ-28 ). That's what the R 700 fit KRG bravo comes with and I know first hand that they fit the Bergara B14R and HMR Pro...
The length on one of them is an "in between" size though. 1 5/8" for the rear maybe? I forget the length exactly but you can buy them off Ebay last I checked. Make sure your new front screw does not bottom out or you'll have accuracy issues.