Q: Will this socket work with Tempest URHM38S Fine Wire spark plugs?
Yes, this product works with all Champion and Tempest Aviation Spark Plugs.
Q: Does this work for the Autolite plugs, which require a deeper socket than the Champion?
It works with both Champion and Tempest plugs, and should work fine with the old Autolite plugs.
Q: Where is this made, USA?
This is made in Taiwan.
Q: What is the size of the hex fitting at the top of the socket?
7/8".