Fit
On my car with the Spax adjustable shocks, I have noted that the bolts are 15/32 in diam (11.9mm), the ID of the bush tube is 12.6 mm so there is approx 0.7mm movement.?
Also the chassis bracket holes for the bolt are 12.2 mm, so another 0.3mm movement.
Shank(shoulder) is only half length of bolt which means half of the bush is on the threads.
At least the bushes fit snugly into the chassis brackets. Inner bush tube and bracket width are same at 38mm.
No guarantee on the measures but were done with vernier.