This idea somehow came to me one day a short time ago as I was contemplating how to make a weather proof hole through the cabin wall for a pipe. It could have a variety of applications.
Use a bulkhead fitting as pictured below. If this was placed when the building was just a shell it would be a relatively simple matter to drill through the sheathing and install one of these wherever needed. They can be had with either standard pipe threaded ends or slip fit ends or a combination.
(http://www.aquacave.com/images/Bulkhead%201.jpg)
One of many sources... http://www.aquacave.com/2-bulkheads-799.html (http://www.aquacave.com/2-bulkheads-799.html)
Probably not a code approved method.