JBO Thread Plug Gauge - Metric Fine Go/No-Go - Left Hand - 6G - M40 x 2

The JBO Thread Plug Gauge is a precision Go/No-Go gauge designed specifically for metric fine threads. It provides a fast, reliable way to verify internal threads in M40 x 2 size, helping engineers, machinists, quality teams, and hobbyists ensure parts fit together correctly.

Designed for left-hand threads and built to 6G tolerances, this gauge delivers consistent, repeatable performance in demanding workshop environments. Its hardened steel construction resists wear, maintaining accuracy through everyday use.

• Go/No-Go Inspection Design: Quickly determine pass/fail for threaded holes with a single check, speeding up quality checks and reducing guesswork.
• Left-Hand, 6G, M40 x 2 Compatibility: Specifically sized for left-hand metric fine threads, ensuring correct fit checks for exact M40 x 2 specifications.
• Hardened Steel Construction: Built to endure daily use and resist wear, preserving measurement accuracy over time.

Using this plug gauge streamlines quality control and assembly workflows by delivering fast, dependable thread checks. It supports consistent results across parts and batches, minimizes rework, and gives you confidence when validating hole quality before mating components.