The JBO Thread Plug Gauge (GO) – Metric Fine, Left Hand, 6H, M45 x 3 is a precision inspection tool designed to verify internal metric fine threads in threaded holes. It’s ideal for machinists, quality control teams, engineers, and workshop technicians who need fast, reliable go/no-go checks to confirm hole size meets specification.

• Precisely sized GO check for M45 x 3 left-hand threads: Provides clear pass/fail guidance to quickly confirm hole readiness, reducing inspection time and minimizing guesswork in setup.
• Durable hardened steel construction: Built to withstand daily use in busy workshops, resisting wear and maintaining calibration for consistent, long-term performance.
• Left-hand thread compatibility: Specifically designed to inspect left-handed threaded holes, expanding testing options and ensuring accurate verification across specialized components.

Using the JBO Thread Plug Gauge (GO) streamlines quality control and manufacturing workflows by providing a fast, repeatable go/no-go check for internal threads. It helps reduce downtime from mis-sized holes, improves consistency across parts, and supports reliable assembly with confidence that parts meet the M45 x 3 left-hand thread specification (6H).