From what I was able to determine from my research, the 023-326-00 brakes are 12" brakes from Dexter and were designed for trailer axles with between 5200 and 7000-lbs capacity. I don't believe that I've ever seen a brake mounting flange that has 6 bolts, so I'm assuming that you actually meant 5 bolts.
To replace the brakes on your trailer, I recommend using the Electric Trailer Brake Kit # AKEBRK-7-SA, which comes with 12" left and right brake assemblies and are designed for up to 7000-lb... view full answer...