The JBO Thread Plug Gauge (NoGo) — Metric Fine — Left Hand, 6H, M68 x 2 is a precision measuring instrument designed to verify the size and condition of metric fine threaded holes. It’s an essential tool for machinists, quality inspectors, and tooling teams who need fast, dependable checks to ensure parts meet exact thread specifications.

Built for durability in busy workshops, this LH metric fine plug gauge is crafted from hardened steel and finished with a knurled body for secure handling. Its compact, robust design makes it a reliable choice for everyday inspection in manufacturing, maintenance, and assembly environments.

• Left-Hand Metric Fine Thread Design: Specifically engineered to fit left-hand metric fine holes (M68 x 2), enabling accurate, trouble-free inspection of LH threaded components.
• NoGo Gauge for Fast, Confident Validation: Designed to prevent over-insertion, delivering quick, decisive checks that help confirm holes stay within their maximum size specification and reduce rework.
• Rugged Hardened Steel Construction: Built to endure rigorous use in demanding environments, with a knurled grip that provides secure handling and precise, repeatable measurements over time.

This gauge supports reliable quality control by delivering consistent measurements on metric fine threads, helping you streamline hole inspection, cut downtime, and maintain exacting standards across parts and assemblies. With its durable construction and purpose-built LH design, it’s a dependable addition to any inspection or machining workflow.