The JBO Thread Plug Gauge is a precision inspection tool designed for metric fine threads. It’s ideal for machinists, quality teams, and maintenance professionals who need fast, reliable verification of threaded holes. This Go/No-Go gauge helps you confirm whether a hole meets the M27 x 1 specification, reducing guesswork during assembly and inspection.

Built for durability and repeatable results, this model features a right-hand interface and a hardened steel body that stands up to daily use in busy shops and production lines. The Go/No-Go design lets you perform quick pass/fail checks, so you can keep workflows moving without sacrificing accuracy.

• Go/No-Go design for quick pass/fail checks: Instantly determine whether the threaded hole accepts the plug, speeding up inspections and reducing rework.
• Hardened steel construction for durability: Resists wear and maintains accuracy through high-volume use and long service life.
• Metric fine thread compatibility (M27 x 1) with 4H tolerance: Ensures consistent engagement and reliable fits across production runs (right-hand orientation).

Using the JBO Thread Plug Gauge helps streamline quality checks, improve assembly reliability, and minimize downtime. Its robust construction and precise metric fine-thread calibration provide confidence in every measurement, supporting better results across manufacturing, maintenance, and engineering tasks.