The JBO Thread Plug Gauge is a precision Go/No-Go tool designed to verify internal metric fine-thread holes quickly and reliably. It’s ideal for machinists, quality teams, and assembly technicians who need to confirm an M16 x 1.25 right-hand thread hole meets specification so parts thread in smoothly and consistently.

Built for tough shop use, this gauge is crafted from hardened steel for wear resistance and long service life. Its two ends provide clear go/no-go checks in one compact instrument, and the knurled body ensures a secure grip in oily or gloved conditions for accurate measurements every time.

• Go/No-Go design for fast, confident checks: Delivers quick pass/fail results on the critical M16 x 1.25 right-hand threads, reducing inspection time and helping prevent misfits in assemblies.
• Metric fine thread compatibility (M16 x 1.25, 6H): Precisely calibrated to metric fine-thread standards, ensuring consistent, reliable results across parts and suppliers.
• Hardened steel construction: Built to withstand daily workshop use, offering longevity, wear resistance, and maintained accuracy over thousands of insertions.

This gauge helps streamline your quality checks, minimizes downtime, and supports dependable, repeatable thread audits in manufacturing, maintenance, and repair environments. Use it to verify hole readiness before assembly and to ensure consistent fit across production runs.