The JBO Thread Plug Gauge (GO) in Metric Fine is a precision inspection tool for internal threads in threaded holes. It’s designed for engineers, machinists, quality teams, and maintenance professionals who need fast, reliable confirmation that holes conform to the M78 x 1.5 fine-pitch standard with 6H tolerance.

Crafted from hardened steel, this gauge resists wear and maintains accuracy through heavy use in busy workshops. Its simple, intuitive design makes it easy to identify properly threaded holes during quality checks, supporting efficient inspection and consistent results.

• Precise metric fine thread verification: Quickly confirm interior threads match M78 x 1.5 with 6H tolerance, helping ensure parts fit reliably and inspections stay fast.
• Durable hardened steel construction: Resists wear and maintains accuracy in demanding environments, extending gauge life and reducing replacement costs.
• Right-hand GO orientation for fast checks: Optimized for common machining setups, enabling quick, unambiguous go/no-go checks with minimal handling.

Using the JBO Thread Plug Gauge (GO) improves inspection speed and consistency, helping you reduce rework and keep production moving smoothly. Its precise dimensions and rugged construction deliver dependable performance across daily use, giving you confidence in every measurement and a streamlined quality control workflow.