The JBO Thread Plug Gauge is a precision inspection tool built for metric fine threads. It’s ideal for machinists, designers, quality teams, and workshops that work with left-hand threads, specifically M10 x 1.25 with a 6H tolerance. The Go/No-Go design lets you perform fast, definitive hole checks to confirm parts fit together without guesswork.

Constructed from hardened steel, this gauge stands up to daily shop use, resisting wear and maintaining accuracy over time so you can rely on consistent results across audits and production runs.

• Go/No-Go Quick-Check System: Instantly verify that a threaded hole meets specification for M10 x 1.25 LH threads, reducing inspection time and preventing incorrect assemblies.
• Hardened Steel Construction: Delivers long-lasting durability with excellent wear resistance, keeping tolerances stable through heavy use.
• Dual-Ended Convenience: Provides go and no-go references in a single tool, simplifying setup and eliminating extra tool changes in busy work environments.

Using this gauge speeds up setups, improves part-to-assembly accuracy, and lowers downtime by delivering repeatable, reliable checks across batches. The robust build ensures dependable performance day after day, so you can maintain tight quality control without sacrificing productivity.