JBO Thread Plug Gauge - Metric Fine Go/No-Go is a precision inspection tool designed for metric fine threads. It helps verify threaded holes quickly to ensure mating components will thread in without surprises. The right-hand design and 6H tolerance support consistent, repeatable checks for M28 x 1.5 holes.

Engineers, machinists, QA technicians, and workshop troubleshooters rely on this gauge to speed setup, reduce guesswork, and guard against undersized or oversize holes that can lead to costly rework. This tool is well suited for production lines, assembly benches, and repair tasks that require dependable thread verification.

• Go/No-Go Quick Verification: Instantly confirms whether a hole meets the target M28 x 1.5 thread spec, delivering a clear pass or fail to speed inspections and prevent late-stage assembly issues.
• Metric Fine Thread Size, M28 x 1.5 with 6H: Calibrated to the exact metric fine thread standard to ensure checks reflect real-world mating threads and tight tolerance control.
• Durable Hardened Steel Construction: Built to endure daily workshop use, resisting wear and maintaining accuracy for long service life and reliable performance.

Using this gauge helps you confirm hole readiness before assembly, reduces inspection time, and supports consistent quality across parts and batches. It provides a dependable, easy-to-use solution for precise thread verification that you can trust in busy shop environments.