The JBO Thread Plug Gauge (NoGo) - Metric Fine - Right Hand - 4H - M55 x 2 is a precision measuring tool designed to verify metric fine threaded holes. It’s ideal for machinists, quality inspectors, and assembly teams who need fast, dependable hole verification to ensure parts meet specification.

Made from hardened steel, this NoGo gauge delivers durable, repeatable measurements in busy workshops and demanding environments, helping you trust every check.

• NoGo metric fine thread verification: Delivers quick pass/fail checks against the NoGo limit for metric fine threads, allowing you to verify hole size and pitch quickly and consistently, reducing rework and speeding up inspections.
• Hardened steel construction: Built from hardened steel for extended life, this plug gauge resists wear and deformation even after frequent use, ensuring dependable results over time.
• Right-hand, 4H tolerance compatibility: Designed for right-hand metric fine threads with the 4H tolerance class, it aligns with standard gauges and fixtures for reliable interchangeability across parts and processes.

Using this gauge helps you confirm threaded hole size with confidence, streamlining setup and inspection workflows. The durable construction reduces downtime from gauge replacement, while the metric-fine sizing (M55 x 2) and right-hand, 4H specification ensure your parts fit as designed.