typically, if I order before 1 PM to ship to a residential address in Chicago, it arrives by UPS the next day.
I may be wrong, but believe someone told me they have a warehouse in NJ, and, when an item is in stock there, you'll get the order in the time you stated. If it's not in that warehouse, then shipping times may be delayed.
Also, my experience with McMaster-Carr has been outstanding. They ship quickly, and, the few times I've had issues, they not only refund my money without question, but will ship a replacement item if possible (depending on the issue).
I even keep the McMaster-Carr app on my phone. This way if I need to buy a bolt at the local hardware store and not sure if I measured the bolt accurately, I use the app to find whether or not such a bolt with those threads exist before I waste a trip to the store; or use the app while in the store.