The JBO Thread Plug Gauge is a Go/No-Go inspection tool designed for metric coarse threads, offered in a left-hand configuration to support specific assembly needs. It quickly verifies threaded holes against the M5 x 0.8 coarse-thread standard, helping engineers, buyers, tradespeople, hobbyists, and inspectors confirm proper fit and function. Constructed from hardened steel to withstand daily shop use, it delivers long-lasting, repeatable go/no-go checks.

• Go/No-Go Design for Fast Pass/Fail: Quickly confirms whether a threaded hole meets the M5 x 0.8 coarse-thread standard, speeding up quality checks and minimizing guesswork.
• Hardened Steel Durability: Built to endure daily use in workshop environments, resisting wear and providing reliable performance over many inspections.
• Left-Hand, Metric Coarse Thread Alignment: Specifically calibrated for metric coarse threads in left-hand configurations, ensuring accurate hole checks and consistent results when pairing with matching components.

Using this gauge simplifies quality control, reduces downtime, and helps ensure every part threads cleanly and fits as intended. Its robust construction and precise go/no-go feedback give you confidence in your measurements, streamline workflow, and support dependable, repeatable results across production runs.