The JBO Thread Plug Gauge is a precision inspection tool designed for metric fine threads, optimized for M20 x 1.25 right-hand threads. It helps machinists, quality teams, and assembly specialists quickly verify hole readiness with a clear Go/No-Go verdict, ensuring accurate thread engagement and faster setup. Built from hardened steel, it resists wear for long service life in busy shops.

• Go/No-Go quick verification: Quickly determine if the threaded hole meets size and pitch requirements in a single check, reducing inspection time and minimizing guesswork.
• Metric fine thread compatibility (M20 x 1.25, right-hand, 6H): Precisely matches M20 x 1.25 right-hand threads with 6H internal tolerance, providing reliable checks for exact-fit applications.
• Hardened steel construction for durability: Built to endure daily shop use, resisting wear and maintaining accuracy through thousands of cycles.

Used in daily QA and assembly workflows, this gauge speeds inspections, improves consistency across parts, and helps reduce rework by giving a clear go/no-go result every time. Its robust construction protects your investment in busy environments while delivering repeatable, confident measurements that support high-quality threaded assemblies.