The JBO Thread Plug Gauge (GO) is a precision inspection tool designed to verify threaded holes to exact metric specifications. It’s ideal for engineers, machinists, quality inspectors, and maintenance teams who need fast, reliable go/no-go checks. This GO gauge is sized for Metric Fine threads in a right-hand orientation, specifically M135 x 3 with a 6H tolerance, ensuring alignment with common production standards.

Crafted from hardened steel, the JBO plug gauge resists wear in busy workshops, delivering long-lasting performance even in demanding environments. The knurled body provides a secure grip, while its straightforward design makes it easy to insert and read results at a glance, supporting rapid QA checks on the shop floor.

• Durable hardened steel construction: Built to withstand daily use in busy shops, resisting wear and maintaining accuracy over time.
• Fast, repeatable GO hole checks: Quickly confirms threaded holes meet size and thread form, reducing inspection time and preventing misfits.
• Metric Fine, right-hand with 6H/M135 x 3: Precisely sized for common metric fine threads, ensuring reliable pass/fail results and easy integration into existing measurement setups.

Using the JBO Thread Plug Gauge helps streamline quality control by delivering consistent, quick verifications of threaded holes. It reduces downtime, improves measurement reliability, and supports traceable, standards-compliant results across production runs.