G'day

I made a stupid mistake today, when putting my scope back on my rifle that I have just bedded, I managed to snap one of the small bolts that clamp the rings onto the Weaver bases.It was my dumb mistake and I should have known better.I always torque them up to 30 inch pounds , but I set it wrong and snapped it off >
I have removed the piece that was stuck in the threads with no damage to the threads but now need a new bolt.Does anyone know what size thread these things use.I have looked at the Burris web site but it doesn't mention anything on there that I can see.I would like to replace it with a cap screw type bolt (The ones that use allen key heads not the screw driver straight slot that the original ones have.If I can find some replacement ones from my local engineering , bolt shop I will replace all of them on the three rifles that I use these rings on .

Thankyou for your time

harro