thread size 1947 U-UH-UL-ULH rear axle

Does anyone know the size of the thread on a 1947 U-UH-UL-ULH rear axle?
I just cannot find the correct size.......

Thanks in advance!

Robert

5/8"(.625) X 18 threads per inch. I think big twins from VL era all the way into shovel head years used this size.