What is the difference between coarse and fine thread bolts?

Coarse threads have larger pitch and are standard for general applications, offering faster assembly, better tolerance to damaged threads, and stronger threads for tapped holes in softer materials. Fine threads have smaller pitch, providing higher tensile strength, better resistance to loosening under vibration, finer adjustment capability, and are used in precision applications and thin-walled components. Fine threads are more susceptible to cross-threading.