The JBO Thread Ring Gauge (GO) – Metric Fine is a precision inspection tool for external threads. It’s designed for manufacturers, machinists, quality teams, and maintenance technicians who need fast, reliable verification of M40 x 1 right-hand threads.

Calibrated to the 6g external-thread tolerance, this gauge helps confirm parts meet the exact GO limit, supporting consistent assembly and reduced rework. Built from hardened steel, it stands up to daily use in busy shops and QC labs.

• Precise Metric Fine GO verification (M40 x 1): Quickly confirm external thread conformance to the GO limit for M40 x 1 right-hand threads, accelerating quality checks and reducing rework.
• Hardened steel construction for long life: Built to endure daily shop-floor use, resisting wear, corrosion, and impact while preserving dimensional accuracy over time.
• Fast, simple go-gauge inspections: Easy alignment and quick confirmation of compliant parts, enabling quicker QC decisions and smoother workflows.

Using the gauge as part of your standard inspection routine helps ensure thread compatibility across assemblies, minimizes guesswork, and supports consistent results over time. Its robust build and straightforward operation make it a reliable addition to any workshop, quality lab, or production line.