The JBO Thread Plug Gauge (NoGo) - Metric Fine is a precision measuring tool designed to verify metric fine threaded holes. It helps machinists, engineers, inspectors, and technicians quickly determine whether internal threads meet exact specifications. Configured for left-hand threads with M45 x 1.5 size and a 6H tolerance, this NoGo gauge provides fast, reliable pass/fail checks during quality control and assembly.

Manufactured from hardened steel, the gauge resists wear and keeps its dimensions accurate through repeated use in demanding workshop environments.

• NoGo gauge for metric fine threads: Tests the largest permitted engagement to confirm holes meet the metric fine standard, enabling fast, objective pass/fail decisions.
• Left-hand configuration: Supports left-hand threaded components or fixtures that require left-handed orientation, expanding your inspection capabilities without adapters.
• Hardened steel construction: Durable, wear-resistant body that maintains accuracy through repeated use and challenging shop conditions.

Using this gauge helps streamline threaded-hole inspections, improve measurement consistency across parts, and reduce rework. Its precise, reliable design supports smoother assembly and stronger quality control across manufacturing, maintenance, and repair tasks.