The JBO Thread Ring Gauge GO - Metric Coarse is a precision go/no-go inspection tool designed to verify external metric coarse threads on fasteners and components. It’s ideal for engineers, machinists, quality teams, buyers, and hobbyists who need quick, reliable checks to ensure parts will thread correctly with mating components.

Crafted from hardened steel for exceptional durability and wear resistance, this gauge is built to withstand daily use in busy workshops. Its right-hand thread, 6h tolerance, and M1.8 x 0.35 size deliver consistent, repeatable measurements that align with industry standards. The tool’s knurled exterior provides confident handling, while the precision bore guarantees accurate assessment of thread fit.

• Accurate GO verification for metric coarse threads: Quickly confirm that external threads meet the M1.8 x 0.35 coarse-thread standard, enabling fast pass/fail decisions on part quality and compatibility.
• Hardened steel construction for long tool life: Built to withstand demanding use, resisting wear and maintaining precise tolerances through many inspections and setups.
• Ergonomic design for fast, reliable inspection: Knurled outer surface and smooth bore allow easy handling, quick alignment, and secure insertion in tight inspection pockets, reducing inspection time.

Using the JBO GO ring gauge streamlines quality control by delivering immediate, decisive results on thread engagement. It helps prevent mismatched parts, reduces downtime from guesswork, and supports traceable QA records by validating that each component matches the standard coarse metric thread (M1.8 x 0.35) under the 6h class. Rely on a durable, reliable tool that provides consistent measurements across shifts, ensuring your assemblies thread smoothly and perform as designed.