The JBO Thread Plug Gauge is a precision tool designed for metric fine-thread inspection, specifically for M5 x 0.25 right-hand threads. Its Go/No-Go design lets you quickly determine whether a threaded hole meets the required minimum and maximum limits, enabling fast, confident quality checks in both production and repair contexts.

Crafted from hardened steel, this gauge delivers durable performance that resists wear through frequent use. Its robust construction supports consistent accuracy over time, helping you maintain reliable measurements even in busy workshop environments.

• Go/No-Go design for fast, decisive checks: Quickly verify hole tolerance by testing the minimum (Go) and maximum (No-Go) limits, reducing guesswork and speeding up inspections.
• Hardened steel construction for long life: Built to withstand daily use, providing lasting accuracy and minimizing replacement or recalibration needs.
• Specifically matched to M5 x 0.25 right-hand threads with 5H tolerance: Ensures repeatable, dependable hole validation aligned with standard metric fine-thread specifications.

By using the JBO Thread Plug Gauge, you gain confidence in every assembly step—quickly validating hole readiness, reducing rework, and supporting consistent results across batches. The combination of precise Go/No-Go checks and durable construction helps streamline quality control and maintain smooth, efficient workflows.