The JBO Thread Plug Gauge is a precision Go/No-Go tool built for metric fine threads. Specifically designed for M14 x 0.75 applications with a 6H internal thread fit, this left-hand gauge helps technicians and inspectors quickly verify threaded holes and ensure parts mate correctly.

Crafted from hardened steel, this gauge delivers reliable performance in busy shop environments. The robust construction resists wear and maintains accurate measurements through repeated use, making it a trusted choice for quality control, assembly, and maintenance tasks.

• Go/No-Go design for fast, confident checks: quickly determine whether a threaded hole falls inside tolerance, reducing inspection time and guesswork.
• Hardened steel construction for durability: proven wear resistance and long service life in demanding workshop conditions.
• Left-hand metric fine thread compatibility (M14 x 0.75, 6H): ensures precise verification for left-hand threaded components and critical assemblies.

Used by engineers, machinists, inspectors, and hobbyists alike, this plug gauge helps streamline quality checks, minimize rework, and improve consistency across assemblies. Its straightforward Go/No-Go operation and durable build deliver reliable results that you can trust in daily workflow.