The JBO Thread Ring Gauge (GO) - Metric Fine - Right Hand - 6g - M39 x 3 is a precision tool designed to verify external thread diameters and pitches quickly and reliably. It’s ideal for engineers, machinists, inspectors, and quality teams who need clear go/no-go checks to confirm parts meet standard specifications.

Made from hardened steel for durability, this GO ring gauge stays accurate through repeated use in busy shops and QC labs. Its right-hand orientation and lightweight 6 g weight make it easy to handle during inspection tasks across a range of threaded components.

• Go/No-Go quick checks: Enables fast pass/fail decisions for external threads, helping you confirm conformity without complex measurement setup and speeding up batch inspections.
• Hardened steel construction: Built for long life in demanding environments, resisting wear to maintain precise dimensions and reliable results over time.
• Compact, lightweight, and grippy: Weighing just 6 g with a knurled exterior, it’s easy to handle, carry in a toolkit, and orient on small parts, reducing setup time on the shop floor.

With the JBO Thread Ring Gauge, you can improve inspection efficiency, cut downtime, and ensure consistent thread quality across parts and assemblies. The combination of precise metric fine threading, durable construction, and straightforward use supports accurate quality control and reliable manufacturing outcomes from start to finish.