The JBO Thread Ring Gauge (GO) – Metric Fine, Left Hand, 6g, M85 x 2 is a precision inspection tool used to verify external thread diameters. It’s designed for engineers, machinists, quality control professionals, and workshop teams who need fast, reliable conformance checks for metric fine threads.

Crafted from hardened steel for exceptional wear resistance, this GO gauge maintains accuracy in demanding environments. Its left-hand configuration ensures compatibility with left-handed fasteners, helping inspectors quickly determine whether a component meets the M85 x 2, 6g specification.

• Exact M85 x 2, 6g left-hand GO gauge: Confirms external thread conformance to the precise metric fine specification, delivering reliable go/no-go results with minimal downtime.
• Hardened steel construction for durability: Withstands repeated testing in busy workshops, maintaining flat seating and long-term accuracy.
• Easy, quick detection of conforming threads: GO-only design and smooth seating allow fast checks and reduced inspection time on the shop floor.

This gauge helps improve workflow by providing clear, fast indications of thread conformity, reducing rework, and enabling consistent assembly quality. Built to endure daily use, it’s a dependable addition to any precision machining, assembly, or quality control process.