The JBO Thread Ring Gauge (GO) - Metric Fine - Left Hand - 6g - M17 x 1.5 is a precision go gauge designed to verify external thread diameters on metric fine LH threads. It’s an essential tool for quality control across manufacturing, machining, and assembly environments, helping professionals confirm that threaded components meet exact standards and specifications.

Crafted from hardened steel for exceptional durability, this ring gauge delivers reliable performance in busy workshops. Its straightforward, single-piece design makes it easy to use for fast go/no-go checks, supporting consistent measurements and reduced rework.

• Go/No-Go Quick Checks: Quickly verify whether the external thread diameter and pitch meet the M17 x 1.5 metric fine LH standard, speeding inspections and reducing guesswork.
• Hardened Steel Construction: Built to withstand daily use in demanding environments, delivering long tool life and maintaining accuracy over time.
• Left-Hand Thread Compatibility: Specifically designed to inspect left-hand threads, ensuring correct gauge usage and reliable results for LH components.

With this gauge in your toolkit, you’ll streamline inspection workflows, make confident pass/fail decisions on the shop floor, and improve first-pass quality across parts and assemblies. The combination of durable construction, precise sizing, and LH-specific design helps you minimize downtime, reduce rework, and deliver consistently accurate results to customers.