The JBO Thread Plug Gauge is a precision instrument for metric coarse threads, enabling fast, reliable go/no-go checks of threaded holes. Its textured knurled grip provides secure handling in busy workshops, so operators can work confidently even when wearing gloves.

Built for durability, this right-hand gauge is specified for M3 x 0.5 holes with a 6H tolerance and is crafted from hardened steel to stand up to regular use, wear, and repeated inspections.

• Go/No-Go Quick-Check: Effortlessly confirm hole size and thread engagement in one pass, reducing inspection time and avoiding under- or over-tolerance parts.
• Hardened Steel Durability: Rugged construction resists wear, maintains accuracy, and stands up to daily workshop use.
• Metric Coarse Thread Specificity (M3 x 0.5) with 6H Right-Hand Precision: Specifically sized for M3 x 0.5 coarse threads with 6H tolerance, ensuring dependable checks for a wide range of miniature assemblies.

With the JBO Thread Plug Gauge, you streamline your inspection workflow. The go/no-go design provides clear, decisive results, letting technicians quickly confirm hole size and thread engagement. The rugged, hardened steel body delivers repeatable measurements in busy shops, helping reduce downtime, rework, and rejected parts while supporting consistent fits across batches.