The JBO Thread Plug Gauge (NoGo) – Metric Fine is a precise inspection tool designed to verify internal metric fine threads. Built for left‑hand M45 x 3 holes with a 6H tolerance, it helps machinists, inspectors, and maintenance professionals quickly confirm that threaded holes meet exact specifications before components are assembled or shipped.

• Accurate NoGo verification for metric fine threads: enables quick pass/fail checks for holes at the 6H tolerance, helping you spot out‑of‑spec parts fast and reduce inspection time.
• Durable hardened steel construction: delivers long tool life in demanding workshop environments and maintains precise dimensions through repeated use.
• Ergonomic, knurled design for easy handling: the secure grip and compact form make insertion, rotation, and removal smooth even in tight workspaces.

Designed to integrate seamlessly into quality control and production routines, this metric fine plug gauge provides reliable, repeatable readings that support consistent results. Use it to validate threaded holes during setup, inspection, or maintenance, helping you minimize downtime and prevent costly rework while ensuring components meet the required standard.