The JBO Thread Plug Gauge is a precision tool designed for metric fine threads. This right-hand Go/No-Go plug gauge helps you quickly verify threaded holes, ensuring components assemble correctly and consistently in every production or maintenance task. Sized for M20 x 1.5 applications with a 4H tolerance, it provides reliable checks that fit seamlessly into standard inspection workflows.

Created for demanding workshop environments, this gauge combines a focused design with durable construction to deliver repeatable results day after day. Its hardened steel build resists wear, extending life in busy QC and assembly lines.

• Go/No-Go design for fast, reliable validation: Quickly confirm whether a hole meets the correct thread size and tolerance, reducing inspection time and guesswork in QC processes.
• Metric fine thread compatibility (M20 x 1.5, 4H): Precisely checks metric fine holes to ensure correct fit with mating components and consistent performance in assemblies.
• Hardened steel construction: Built to stand up to daily use in workshops, offering long life, wear resistance, and dependable measurements.

By delivering quick, unambiguous pass/fail results, this gauge reduces setup time and speeds quality checks, helping you achieve reliable fits and repeatable results across machining, assembly, and maintenance tasks. Its robust construction and precise Go/No-Go functionality provide confidence in every measurement and support smoother, more efficient workflows.