The JBO Thread Plug Gauge is a precision inspection tool crafted for metric fine threads, specifically designed to verify threaded holes with accuracy and speed. Ideal for machinists, quality control technicians, engineers, and workshop staff, it helps ensure that M8 x 0.75 holes will accept fasteners and inserts as intended.

This Go/No-Go gauge delivers quick, reliable checks in a busy production environment. By simply testing with the Go and No-Go ends, you can confirm proper thread depth and tolerance at a glance, helping you prevent misfits and rework before parts move to the next stage.

• Go/No-Go design for fast verification: One end should thread in smoothly to full depth (Go), while the other end should stop or bind before full depth (No-Go), giving you an immediate pass/fail read on hole tolerance.
• Durable hardened steel construction: Built to endure daily shop use, resisting wear and maintaining accuracy over many inspections for long-lasting performance.
• Precision for metric fine threads (M8 x 0.75), right-hand, 6H: Specifically calibrated for standard metric fine-thread holes with a right-hand orientation and 6H tolerance, delivering consistent, repeatable checks across parts and assemblies.

Using the JBO Thread Plug Gauge helps you speed up quality checks, reduce rework, and ensure dependable thread engagement across production runs. Its rugged build and precise calibration give your team the confidence to assemble with confidence, improve workflow efficiency, and maintain tight tolerances without guesswork.