I would like to go on the record that above statements are actually not correct. Especially "Technical German is virtually a completely different language". German is not Japanese.
There are of course technical terms not widely used in normal house-keeping, but that is just like in the US.
Ask your secretary what a Blanchard grinder is, or a shaper, or broaching, or a screw machine (may want to hold off on the last one).
If in Europe there is no need to buy anything in the US, possibly with very minor exceptions (inch stuff?) or due to currency fluctuations. There may not be a one-stop-shop like McMaster in Europe (I think), but McM is really a convenience store, where you pay extra for the convenience. That is also a key reason for Würth haven gotten so big in Europe. Bad planning means just in time ordering, means extra cost for the convenience. If you have a steady production going you'll hardy work like that. Yes I know Würth also seems to have unique stuff, but really they just put their name on stuff.