The JBO Thread Plug Gauge (NoGo) – Metric Fine is a precision inspection tool designed to verify metric fine threaded holes. It is ideal for engineers, machinists, quality inspectors, and workshop teams that need reliable hole verification for M56 x 1.5 right-hand threads within the 6G tolerance.

Made from hardened steel for durability, this gauge is built to withstand the rigors of busy shops. The textured knurled grip provides secure handling, even in tight spaces, helping you perform quick, confident inspections every shift.

• Go/NoGo quick-check design: Enables fast, clearly defined pass/fail checks to verify thread holes meet the 6G M56 x 1.5 specification, reducing inspection time and human error.
• Metric Fine threading accuracy (M56 x 1.5, Right-Hand, 6G): Precisely sized to target metric fine holes, ensuring reliable hole validation across parts and batches.
• Hardened steel construction: Delivers exceptional durability and wear resistance for long service life in busy workshops and production lines.

Using the JBO Thread Plug Gauge (NoGo) accelerates setup and inspection workflows by providing quick, reliable checks for metric fine threads. The hardened steel gauge resists wear, preserving accuracy over time and across shifts, helping teams reduce rework and maintain consistent thread quality.