The JBO Thread Ring Gauge GO - Metric Coarse, Left-Hand, M1.6 x 0.35 (6g) is a precision inspection tool designed to verify external threads on components with metric coarse, left-handed threads. It's ideal for engineers, machinists, quality inspectors, and assembly teams who rely on accurate thread size and pitch to ensure proper fit and performance.
The gauge is manufactured from hardened steel for durability and wear resistance, built to hold its shape through repeated use. A knurled outer edge provides a secure grip, while the precisely machined bore and threading ensure consistent seating and reliable measurements in busy workshops.

• Fast GO verification for metric coarse left-hand threads: Quickly confirms the minimum size and pitch of M1.6 x 0.35 left-hand threads, speeding inspections and reducing guesswork on the shop floor.
• Durable hardened steel construction: Built to withstand daily use in demanding environments while maintaining measurement accuracy over many cycles.
• Left-Hand M1.6 x 0.35, 6g tolerance: Specifically designed to fit left-handed coarse threads with the 6g tolerance, delivering repeatable GO readings and reliable results.

Using the JBO GO ring gauge in your quality workflow helps you quickly validate thread fit on new parts, reduces rework from mis-sized threads, and supports traceability with consistent pass/fail readings. Its durable construction and simple operation minimize downtime, while its compatibility with metric coarse left-hand threads ensures you can rely on the gauge across a range of parts and processes—from production lines to repair and maintenance tasks. This gauge helps you achieve repeatable results, faster inspections, and confident decisions during quality control and assembly.