A system including a wellhead hanger, such as a casing hanger, and a running tool with a stopping protrusion that reduces the likelihood over-torqueing of threads coupling the running tool to the wellhead hanger and that reduces the break-out torque for disengaging the running tool and wellhead hanger from each other upon the completion of casing string cementing. Limiting the thread-per-inch count of the hanger and running tools, respectively, to the range of two threads-per-inch to four threads-per-inch also lowers the break-out torque between the hanger and running tool.