I wish that manufactures would indicate what threads are use in their products. Many times a nut or bolt is lost and trying to find a match can be a pain in the ass getting the right one. I even have some tools that have both. Also fine and coarse. not to mention Withworth threads.
Most machine manuals list screw sizes, thank God. I lost a screw that vibrated out of the head lock on my planer once. Found the manual, went to the hardware store and I was back in business in short order. Then, of course I found the original screw on the floor immediately after I put the new one in.
All the hardware stores have those nuts and bolts identifiers so if you have a broken piece of it, at least you can identify what it is and buy a replacement. A little tougher when you don’t have any spares to bring or a manual that identifies the size.