A Thread Ring Gauge is a precision tool used to inspect the external threads of a screw or bolt to ensure they meet specific size and tolerance requirements. It is designed in the form of a ring with internal threads that correspond to the required external thread dimensions. Typically made of hardened steel for durability, thread ring gauges come in “Go” and “No-Go” types, allowing manufacturers to quickly check whether a part passes or fails. These gauges are essential for maintaining quality control in industries such as automotive, aerospace, and manufacturing, where accurate threading is crucial for assembly and performance. Their simplicity and reliability make them indispensable in fastener inspection.