The JBO Thread Plug Gauge is a precision tool designed to check internal metric fine threads, specifically for M40 x 2 holes. It’s ideal for machinists, engineers, quality inspectors, and assembly teams who need fast, reliable verification of threaded holes.

With a Go/No-Go design and hardened steel construction, you can count on quick, repeatable checks that help reduce downtime and ensure components thread together smoothly and accurately.

• Fast Go/No-Go Verification: Quickly determine whether an internal M40 x 2 fine thread hole meets the spec with a simple go/no-go test, speeding up inspections and eliminating guesswork during assembly.
• Durable Hardened Steel Construction: Built to withstand daily use in demanding environments, delivering long service life and stable measurements through thousands of insertions.
• Precise Metric Fine Thread Standard (M40 x 2, 6H, Right-Hand): Engineered to the 6H tolerance class for accurate, right-hand threads, ensuring reliable fit with standard fasteners and consistent performance across jobs.

The JBO Thread Plug Gauge helps you streamline quality control, reduce rework, and maintain consistent, dependable results across production runs. Its robust construction and precise tolerances translate to fewer surprises during assembly, helping you meet deadlines and uphold rigorous workmanship standards.