The JBO Thread Plug Gauge is a precision tool for inspecting internal metric threads, tailored for right-hand M30 x 2 holes in the 6G class. It's a practical choice for engineers, machinists, inspectors, and serious hobbyists who need quick, dependable thread verification.

Featuring a Go/No-Go design, it lets you confirm tolerance with a simple test: the Go end should thread in with a smooth, consistent feel, while the No-Go end must not screw in past the tolerance limit. Made from hardened steel, this gauge delivers durable, long-lasting performance in busy workshops.

• Go/No-Go Design: Quickly verify hole tolerance with a simple pass/fail test—no guessing or additional fixtures needed.
• Metric Fine Thread Match (M30 x 2, 6G): Precisely calibrated for metric fine threads at M30 x 2 within the 6G class, delivering repeatable checks across parts.
• Hardened Steel Construction: Rugged, wear-resistant body maintains accuracy through thousands of insertions in demanding workshop environments.

In practice, the JBO Thread Plug Gauge helps streamline setup, reduce downtime, and improve assembly reliability by ensuring only correctly sized internal threads progress to assembly. Its straightforward go/no-go feedback provides confidence for every part, helping teams maintain consistent quality and faster throughput.