Sometimes I want to change industries just so I can order from them all the time.
(Some other business-getting-work-done sites are similar, https://www.uline.com or https://www.grainger.com but they have color and can't compete with McMaster Carr.)
Their target custom is someone who needs to quickly get the item so they can go back to their job; make and price are not their concern -- to the extent that you can just email them and say "give me five more shelves" and their customer support people will look through your purchase history to match the model and paint scheme you bought. Or if you're a power plant, you can tell them to get the part to you RIGHT NOW, and they'll pay a courier to drive it from hundreds of miles away. (These are both true stories.)
McMaster's customer behavior is the dream of almost every industry out there.
It starts with a picture and then you get to the gory details.
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