The JBO Thread Plug Gauge (NoGo) is a precision inspection tool designed for metric fine threads. This right-hand plug gauge targets the metric fine standard M55 x 1.5 with a 6G tolerance and is ideal for verifying the accuracy of threaded holes in mechanical assemblies, whether in manufacturing, maintenance, or workshop settings.

Built from hardened steel for durability and wear resistance, the gauge features a knurled body for secure grip and repeatable measurements even in busy environments.

• Precise metric fine threading (M55 x 1.5, 6G): Engineered specifically for metric fine threads, enabling reliable, repeatable hole measurements and consistent results across parts.
• NoGo quick tolerance verification: Designed to quickly indicate whether a threaded hole is within spec, helping reduce inspection time and prevent rework.
• Rugged, knurled, wear‑resistant construction: Hardened steel with a textured grip ensures durability and easy handling, even with gloves, for long tool life in demanding environments.

Using the JBO Thread Plug Gauge (NoGo) streamlines internal-thread inspection, delivering fast, reliable checks that help prevent production delays and maintain consistent quality. Its durable build supports daily use in workshops and production lines, while the compact, hand-held design integrates smoothly into existing QC workflows and operator training.