The JBO Thread Plug Gauge (GO) is a precision inspection tool designed to quickly and reliably verify threaded holes that use metric fine threads. Specifically configured for Right Hand M58 x 1 threads and 6H tolerance, it’s ideal for engineers, machinists, quality inspectors, and hobbyists who need fast, confident go/no-go checks to confirm holes meet exact specifications.

Made from hardened steel, this GO gauge is built to withstand the rigors of busy workshops and long service life. Its purpose-built design simplifies identifying properly threaded holes, supporting consistent quality control and efficient workflow in manufacturing, assembly, and maintenance tasks.

• Hardened steel construction: Delivers long tool life and superior wear resistance for reliable use in demanding environments, reducing replacement frequency and downtime.
• Metric fine-thread GO gauge (M58 x 1): Provides precise, quick go/no-go verification for metric fine threads, helping you catch undersized or damaged holes early and minimize rework.
• Right-hand orientation with 6H tolerance: Ensures consistent, repeatable inspections aligned with standard thread forms, boosting confidence across batches and setups.

Using the JBO Thread Plug Gauge helps you speed up hole verification, reduce assembly delays from misthreaded components, and maintain tight tolerances across production runs. With its rugged construction and exact dimensions, you can rely on steady performance and repeatable results in everyday quality checks and precision engineering projects.