Moving fridge on what thickness of masonite.
How to protect hardwood floors when moving a refrigerator.
A fridge is extremely heavy if you try to move it without using furniture sliders it will definitely scratch your floors simple because hardwood flooring is extremely sensitive to.
Use a floor protector to prevent damage to your floors when moving a refrigerator out from the wall.
Nothing like that came up when i searched their website just hardboards 3 4 thick.
Another option is to use felt furniture slider pads and spare laminate flooring panels.
I saw your suggestion to try masonite sheets from a big box store to protect the floor from dents.
I have engineered hardwood floors in the kitchen.