Rog, did you measure/try - is the bracket hole diameter large enough for M10 or will I need to enlarge? The original screw size of 3/8 is around 0,96mm, so asking before ordering.
Thanks
Peter
Thanks Richard

Re the screw size. They are M8 x 70’s (and long enough for my rack brackets too). I have ordered up some M10’s but they are still in the post so will probably stay with these. I also countersunk a couple of M12 stainless washers so that the heads seat nicely and still work in the slots in the brackets