This question comes up alot from automotive guys.
Pretty much everything that isn't an automobile is going to have standard fasteners. Im and industrial mechanic, working in paper Mills, cement plants, foundries, grain mills I'd say I run into about 80 percent standard hardware. It depends on where the equipment comes from. In the cement plant, the raw mill itself (originally manufactured in Germany) has all metric hardware. All of the chutes, conveyors, ductwork, structural steel that surround it is all standard.
At Hallmark cards a good deal of the machinery is designed and built in-house and it all depends on which engineer designed it.