The JBO Thread Plug Gauge is a precision tool for verifying metric coarse internal threads in holes and housings. Designed for machinists, quality teams, and maintenance technicians, it quickly confirms that threaded connections will assemble and function as intended. This Go/No-Go gauge is configured for M18 x 2.5 coarse threads and uses a right-hand orientation to match standard fastener threads.

With a robust hardened steel body and a knurled grip, it stands up to daily workshop use and repeated insertions, delivering dependable performance over time.

• Go/No-Go design for rapid hole inspection: Quickly verify both minimum and maximum thread conditions, enabling fast decisions and reducing downtime.
• Durable hardened steel construction: Resists wear from frequent use and provides long tool life in demanding environments.
• Exact M18 x 2.5, 6G, right-hand specification: Ensures compatibility with common metric coarse threads and delivers consistent, repeatable checks across parts.

This plug gauge helps you streamline quality checks, minimize guesswork, and ensure reliable thread engagement across assemblies. By delivering quick, confident go/no-go results, it supports tighter production schedules, less rework, and improved overall part fit and performance.