The JBO Thread Plug Gauge (NoGo) – Metric Fine is a precision measuring tool designed to verify metric fine threaded holes. Specifically sized for M55 x 1, right-hand threads with a 6H tolerance, it helps machinists, inspectors, and quality teams confirm holes meet spec quickly and consistently.

Made from hardened steel with a knurled body and a color-coded collar, this NoGo gauge is built for durability and easy handling in busy workshops. Its robust construction resists wear, delivering reliable measurements across many uses.

• Metric Fine NoGo gauge for M55 x 1, Right-Hand, 6H: NoGo limit checks ensure holes do not exceed the maximum size, helping catch out-of-tolerance parts during inspection.
• Hardened steel construction: Durability and wear resistance for long service life in demanding environments, maintaining accuracy over time.
• Ergonomic knurled body with color-coded collar: Secure grip and quick identification in fast-paced QA lines, reducing setup time and operator fatigue.

Used as part of a robust quality control routine, the JBO NoGo Gauge helps you quickly reject oversized holes, ensure proper thread engagement, and sustain consistent results across production runs — empowering confident decisions and smoother assembly workflows.