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The Plug Thread Gage is an exceptional tool designed for precision measuring and inspection of threaded components such as screws or bolts by using go and no-go method, ensuring accurate threads are produced according to industry standards. It comes with a 1-1/8''-7 Thread size and classified as 3B meaning it's an accurate measurement tool used for fine pitch threads, suitable for industrial or mechanical engineers requiring high precision inspection of thread dimensions in mass production setups. It features double end design that includes go plug gauge (threaded) to check the correct fit while no-go gauge is used as a reference size limiting errors while maintaining its accuracy on reusable standards due to its 3B class standardization suitable for use in aerospace, automotive, medical and general machining industries.