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Contact SupplierA plug gauge is a precision inspection tool, typically made of wear-resistant steel, used in manufacturing to quickly verify if the internal diameter (bore) of a hole meets specified dimensional tolerances. It uses a "Go/No-Go" system: the "Go" end must fit into the hole (lower limit), while the "No-Go" end (often marked) should not. They are essential for quality control in automotive, aerospace, and medical industries.



