The JBO Thread Plug Gauge is a precision go/no-go gauge designed for metric fine threads. It is specifically configured for M5.5 x 0.5 threads with a right-hand 6G tolerance class, making it ideal for engineers, machinists, quality inspectors, and hobbyists who need reliable hole-thread verification quickly and consistently.

Crafted from hardened steel, this gauge delivers long-lasting performance in busy workshops. The knurled body provides a secure grip for precise handling, even in tight spaces, while color-coded ends help you distinguish between Go and No-Go checks at a glance for fast, confident inspections.

• Go/No-Go quick verification: Quickly determine if a threaded hole meets the required tolerance, speeding inspections and reducing guesswork.
• Metric fine thread accuracy for M5.5 x 0.5: Precisely tuned for this size and 6G specification, ensuring you verify the exact thread fit you rely on in assemblies.
• Durable hardened steel with a knurled grip: Built for daily use in demanding environments, providing lasting durability and secure handling even with gloves on.

This plug gauge helps streamline your quality checks, minimize downtime, and deliver consistent results across parts and projects. Rely on its sturdy construction and clear go/no-go feedback to support accurate, repeatable thread verification in every workflow.