The JBO Thread Plug Gauge is a precision Go/No-Go tool designed for metric fine threads. Built for right-hand threads in M6 x 0.25 with a 5H tolerance, it helps ensure internal threads in housings, fixtures, and components are within specification. The compact, dual-ended design lets you quickly verify whether a threaded hole is within tolerance.

• Go/No-Go dual ends for fast, reliable hole inspection: Quickly verify whether internal threads meet the required tolerance without disassembly, delivering clear pass/fail results every time.
• Metric fine threading compatibility (M6 x 0.25, 5H): Ensures accurate engagement with mating parts and consistent thread checks in demanding production environments.
• Hardened steel construction with knurled grip: Provides long-lasting wear resistance and a secure, comfortable grip even in busy, oily workshop settings.

Using this gauge in your quality checks helps you catch undersized or oversized threads at the source, improving part fit, reducing downtime, and delivering repeatable, trustworthy results across your manufacturing or assembly workflow.