Q: My stud is 1/2" diameter at both ends with 20 TPI. Your picture shows one end is smaller diameter than the other. Can you clarify that for me?
A: The other side is 7/16" fine thread.
Q: Will this work with a 1966 1100A drivers-side top rear shock absorber? Thank you as always.
A: These are a universal part, they should work.
Q: Will this fit a 2001 Nissan Xterra rear upper shock mount?
A: No.