The JBO Thread Plug Gauge is a precision tool for verifying left-hand metric fine-threaded holes. Its Go/No-Go design lets you confirm at a glance whether a hole meets the required specification, enabling quick, reliable decisions during assembly and quality checks.

Sized for M33 x 3 threads and 6H tolerance, this gauge is built for durability and long service life in busy workshops and manufacturing environments. The hardened-steel construction stands up to daily wear while delivering consistent readings.

• Go/No-Go design for fast checks: Quickly determine if a hole meets the tolerance, reducing inspection time and the need for second-guessing during assembly.
• Left-Hand metric fine threads (M33 x 3, 6H): Precisely matches left-handed M33 x 3 threads with 6H tolerance to ensure accurate testing and reliable fit verification.
• Hardened steel construction: Resists wear and maintains accuracy over many cycles, providing dependable performance in demanding environments.

Using the JBO Thread Plug Gauge helps you verify hole readiness quickly, reduce rework, and maintain tight tolerances across assemblies. The durable, knurled design ensures confident handling, and the Go/No-Go checks translate to faster setup and fewer defects on the line.