The JBO Thread Plug Gauge is a precision tool designed to verify metric fine threaded holes. Specifically tuned for left-hand M30 x 1 threads (6G), its Go/No-Go design lets you confirm fit quickly and confidently while eliminating guesswork.

• Go/No-Go quick-check for accurate threading: Quickly determine whether a hole accepts the thread or is out of tolerance with a single inspection, reducing downtime and rework.
• Left-Hand metric fine-thread compatibility (M30 x 1, 6G): Engineered for left-handed, fine-thread holes to deliver consistent, reliable results across LH applications.
• Hardened steel construction for durability: Built to endure daily workshop use, resisting wear and maintaining precise measurements over time.

Using the JBO Thread Plug Gauge helps streamline quality checks, ensure reliable fits, and minimize production delays. Its robust construction and precise design give you the confidence to achieve consistent results across every inspected part and assembly.