I ordered these for a custom car I am building. The size did not work out for me. It is really hard to order parts like this because there is no listing of dimensions. So here are some rough dimensions based on my measurements.
shaft diam: 3.4mm
shaft lenght :72 mm (from the pivot points, not overall length)
thread diam: 4mm
thread lenght: 9mm
Total Length: 100mm