The JBO Thread Plug Gauge is a precision tool designed for verifying metric coarse threaded holes. It’s ideal for engineers, machinists, quality inspectors, and workshop technicians who need fast, reliable checks to ensure parts thread in cleanly and consistently. With a go/no-go design, you can quickly confirm whether a hole meets the M3.5 x 0.6 size and the 4H tolerance, enabling confident pass/fail decisions and smoother downstream assembly.

• Go/No-Go verification for M3.5 x 0.6 with 4H tolerance: Quickly determine if a threaded hole meets the standard size and tolerance, delivering a clear pass/fail result for fast, repeatable inspections.
• Hardened steel construction: Built for durability in busy workshops, resisting wear and delivering reliable readings over many uses.
• Right-hand orientation for standard metric coarse threads: Designed to match common assemblies, ensuring straightforward setup and consistent checks with existing tools.

Using this gauge helps streamline quality control, reduce rework, and accelerate assembly. It provides confidence that hole features will accept fasteners as intended, improving overall workflow, consistency, and product reliability.