The JBO Thread Plug Gauge is a precision tool designed for metric coarse threads. It features Right Hand orientation, 4H internal tolerance, and a compact M1.4 x 0.3 size, making it ideal for verifying threaded holes in precision components.

Built for durability and quick checks, this plug gauge lets you verify fitment at a glance—ensuring parts thread smoothly and meet specification before assembly.

• Go/No-Go Quick Check: Quickly confirm hole readiness by performing simple Go/No-Go checks, delivering fast, reliable decisions and reducing trial fits.
• Metric Coarse Thread Coverage (M1.4 x 0.3): Precisely matches common metric coarse threads, ensuring consistent verification across assemblies and preventing misfits.
• Hardened Steel Durability with 4H Tolerance: Built to withstand busy workshop use, maintaining accuracy over time and aligning with standard internal thread tolerance for reliable results.

Using the JBO Thread Plug Gauge, you gain fast, repeatable thread verification that reduces inspection time and minimizes the risk of misfits in production. The go/no-go method gives you clear pass/fail outcomes on threaded holes, helping you improve first-pass yield and cut rework. With hardened steel construction and a compact, hand-friendly form, it stands up to daily shop use and fits easily in tool kits, making quality control simpler and more dependable across projects.