The JBO Thread Plug Gauge is a precision inspection tool designed for metric fine threads. It helps engineers, machinists, and quality-control professionals quickly verify internal threads in housings, adapters, and other components to ensure parts fit together smoothly.

Sized for M18 x 1 with right-hand orientation and 4H tolerance, this Go/No-Go gauge offers fast, repeatable checks on hole quality and consistency across production runs.

• Go/No-Go quick-check for M18 x 1 fine threads: Rapid, repeatable inspection for metric fine threads in right-hand holes with 4H tolerance, helping you confirm fits at a glance and cut rework.
• Hardened steel construction for long life: Built to withstand frequent use in busy workshops, providing wear resistance and reliable performance over thousands of measurements.
• Ergonomic knurled grip for precise handling: Textured, non-slip surface ensures quick, stable positioning even with gloves, delivering consistent and repeatable results.

With the JBO Thread Plug Gauge, you gain confidence and speed in threading inspections. It enables faster setup, reduces misfits, and promotes consistent hole quality across batches, supporting efficient assembly and reliable performance in the field.