The JBO Thread Plug Gauge is a right-hand, metric fine-thread plug gauge designed for fast, reliable inspection of internal threads. Sized for M18 x 1.5 holes, its Go/No-Go design lets you quickly confirm whether a hole meets specification, helping parts fit together with confidence.

Crafted from hardened steel for long service life, this gauge withstands daily use in machining and quality-control environments. The knurled, textured body provides a secure grip, making it easy to handle even in busy workshops.

• Go/No-Go quick verification: Instantly determine if the internal thread meets spec with clear pass/fail feedback, speeding up inspections and reducing guesswork.
• Metric fine-thread precision (M18 x 1.5, 6H): Engineered for tight tolerances on metric fine threads, delivering consistent results and reliable fits across parts.
• Rugged, hardened-steel construction with knurled grip: Built for durability in demanding environments, with a secure, comfortable grip that stays put under routine shop conditions.

Using this gauge simplifies threaded-hole QA, shortens setup and inspection times, and helps maintain uniform assembly quality. Its durable construction and precise sizing ensure repeatable results, reducing downtime and improving overall workflow across manufacturing, maintenance, and workshop environments.