Mil Spec doesn't mean anything, it is just like the word Jumbo
There are US Military Specs for everything, and I do mean everything, including the thickness and composition of the toilet paper in the standard field latrine. If you have ever tried to wipe your ... with it, you will know that it is the worst toilet paper in the world.
There are over a thousand different specifications for wiring in the Mil Spec system, most of them are not at all suitable for use on boats.
A consumer marine grade terminal strip, can be installed and serviced anywhere by anyone at any time. If you think that poorly crimped connectors exist on the ends of most DIY wire connected to a terminal strips, you should see the number of connectors that I have seen Manufactured by AMP and installed incorrectly by everyone, including some great crew chiefs in the military.
You will also find that the Mil Spec system links each one of those "Mil Spec" connectors to a specific use, the specific pin size and conductor rating is for the equipment that it is Speced out to be installed on. They are doing different things than we are with different parts on different machinery.
If you like AMP connectors please continue to use them, as I said, most of the time I wire directly to the panel, no breaks in the wire, as there isn't a need for them. I have never needed to "Quickly Remove a control Panel on a 40 foot sailboat". I have had to troubleshoot more than my fair share of them.
Make sure that you use the correct AMP connectors for the voltage and amperage that are required for the project that you are working on. The make a few of them that are even water tight.
Not trying to start a flame war here, just a note for future people looking at the thread.
Guy