The JBO Thread Plug Gauge is a precision inspection tool designed to quickly verify UNJF threaded holes and plugs. It’s ideal for manufacturers, automotive shops, and aerospace environments that rely on consistent thread fits to ensure proper assembly and performance.

With a Go/No-Go design, right-hand threading, and a 1/4 x 28 size in 3B tolerance, this gauge delivers confident, repeatable results across parts and suppliers. Its knurled grip and color-coded ends help operators use it quickly and accurately in busy workshops.

• Go/No-Go quick check: The go/no-go faces provide rapid pass/fail signals, enabling you to distinguish conforming threads from out-of-tolerance holes in seconds without extra tools.
• UNJF Right-Hand 1/4 x 28, 3B tolerance: Standardized size and tolerance ensure consistent measurements across parts and supplier lots, improving inspection reliability and traceability.
• Ergonomic, durable design: Knurled body and color-coded ends deliver a secure grip and fast visual orientation, supporting long inspection sessions and repeatable results in demanding environments.

Using the JBO Thread Plug Gauge streamlines your quality control workflow by delivering fast, reliable checks that minimize guesswork and rework. It helps ensure every threaded hole or plug meets specification, reducing downtime and warranty issues while supporting consistent assembly performance across production runs.