The JBO Thread Plug Gauge GO, Metric Fine, Right Hand, 6H - M42 x 1.5 is a precision go gauge crafted to verify threaded holes quickly and reliably. Designed for engineers, machinists, inspectors, and maintenance teams, it helps confirm that internal M42 x 1.5 threads meet the exact 6H tolerance in a straightforward go/no-go check.

• Exact metric fine thread size M42 x 1.5 with 6H tolerance: enables fast, repeatable go checks against hole specification so nonconforming threads are caught early and workplaces stay on schedule.
• Hardened steel construction for lasting accuracy: delivers superior wear resistance for long service life, maintaining precise measurements even after heavy use in demanding environments.
• Ergonomic knurled body with right‑hand design: provides a secure grip and easy alignment in busy workshops, helping you achieve consistent insertions and reliable results every time.

Used correctly, this gauge streamlines quality control and setup processes by delivering clear pass/fail indications for threaded holes. It supports faster inspections, reduces rework, and helps ensure consistent thread quality across parts and assemblies.