D2a wheel bolt thread sizes

[gavinwibrow]

I must be losing the plot!
I'm trying to locate the wheel bolt size to make up a second spare wheel bracket for a swing arm. I've searched rave, but can't find a reference to the bolt thread/size. I know I need at least 1.5 inches of clear thread, and ideally high tensile bolts x 3 but can't find any reference to the thread size.
Help , pretty please?

[AndyW]

If memory serves they are metric 14mm x 1.5
I believe the modern Commodores run the same stud size.