JBO Thread Plug Gauge - Metric Fine Go/No-Go - Left Hand - 6H - M30 x 2 FMH while maintaining a secure

while maintaining a secure

efficient reaming and a smoother finish

and reliable performance in high-speed milling

stub‑length form factor

The straight shank offers stable alignment in fixtures

JBO Thread Plug Gauge - Metric Fine Go/No-Go - Left Hand - 6H - M30 x 2 FMH while maintaining a secureThe JBO Thread Plug Gauge is a precision inspection tool designed for metric fine threads. This left hand gauge covers M30 x 2 with a 6H tolerance, making it ideal for assemblies where exact thread fit matters. Its a practical choice for machine shops, quality labs, and maintenance teams that need reliable go no go hole checks in tight tolerance work. With its Go No Go design, you can quickly verify whether a threaded hole meets spec, reducing setup