The JBO Thread Plug Gauge is a precision Go/No-Go tool designed to quickly verify internal metric fine threads. It's ideal for engineers, machinists, inspectors, and assembly teams who need fast, accurate checks to ensure parts thread together cleanly.

Sized for right-hand metric fine threads, including M34 x 1, and built to a 6G specification, this gauge delivers consistent results in demanding environments. It features hardened steel construction for long-lasting performance and wear resistance, so your QA checks stay reliable after repeated use.

• Go/No-Go Quick Verification: Fast pass/fail checks of internal threads, allowing you to confirm fit without disassembly and keep production moving.
• Metric Fine Thread Precision (M34 x 1): Engineered for metric fine threads to ensure accurate engagement and reliable hole checks in common sizes like M34 x 1.
• Durable Hardened Steel Construction: Built to withstand daily shop use, delivering stable, long-lasting measurements that resist wear and maintain accuracy.

The JBO Thread Plug Gauge helps you speed up threaded-hole inspections, reduce rework, and improve overall assembly quality. Its Go/No-Go design provides clear pass/fail indications, enabling quick validation of hole threads and confidence in every mating pair. With rugged construction, you gain a dependable tool that supports tighter tolerances and consistent results across your workflow.