The JBO Thread Plug Gauge (GO) is a precision left-hand, metric-fine plug gauge designed to verify M48 x 1.5 threads to 6H tolerance. It’s ideal for machinists, quality inspectors, and maintenance teams who need fast, reliable go checks of threaded holes to ensure parts meet specification.

• Precise metric-fine LH GO gauge: Specifically sized for M48 x 1.5 left-hand threads, this plug gauge provides quick, pass/fail checks of threaded holes, helping keep production moving and tolerances in check.
• Hardened steel construction: Delivers excellent wear resistance and long service life in busy shops and toolrooms.
• Easy to use for fast checks: GO gauge design enables rapid identification of properly threaded holes, reducing inspection time and supporting consistent quality control.

Using this GO gauge streamlines thread inspection across production and maintenance, delivering consistent results with minimal handling. It helps you confirm correct hole geometry before assembly, cutting rework and misfits. The durable, long-lasting gauge stands up to daily use in metalworking environments, so your team can rely on precise measurements now and into the future.