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Glossary
Coarse Thread
A coarse thread is a screw or bolt thread with fewer, deeper, and more widely spaced threads compared to a fine thread of the same diameter. This design makes coarse threads easier to assemble, more resistant to stripping, and better suited for softer materials or rough conditions.
They are commonly used in general-purpose fasteners, construction, and automotive applications, where durability, speed of installation, and resistance to damage are more important than fine adjustment or maximum tensile strength.
Unified National Coarse Thread (UNC)
A standard thread form with a relatively wide pitch, meaning fewer threads per inch compared to fine threads of the same diameter. UNC threads are commonly used in general-purpose fasteners due to their strength, ease of assembly, and better resistance to stripping in softer materials.