No, of course they wouldn’t make such pressure official. But it’s not exactly a secret that the U.S. arms industry has a lot of political pull. Not hard to imagine that such pull extends to “helping” NATO subjects to pick the right suppliers.
As for article 5, that might explain the second gulf war and/or Afghanistan, but certainly not the first gulf war, Libya or Syria.
Whenever Uncle Sam says “jump”, you’ll see all the small NATO states lining up to ask “How high?”.