The JBO Thread Plug Gauge – UNF Go/No-Go, Right-Hand, 3B, 1 1/4 x 12 is a precision inspection tool designed for professionals who rely on accurate internal thread checks. It helps manufacturers, automotive shops, aerospace suppliers, and general machining teams quickly verify that threaded holes meet UNF standards. The go/no-go design provides a fast, clear pass/fail indication, making quality checks straightforward and dependable.

• Go/No-Go quick verification: Instantly determine whether a threaded hole is within spec by testing against both ends, reducing inspection time and enabling fast decision making on part fit.
• Precise UNF RH 1¼ x 12, 3B tolerance: Calibrated to the Unified Fine thread standard with right-hand orientation and 3B tolerance, delivering consistent, repeatable results across work orders and batches.
• Ergonomic, durable two-end design: Knurled grip and balanced construction provide secure handling in busy shop environments, supporting reliable measurements with less fatigue.

Using this gauge streamlines quality control by delivering clear pass/fail results, reducing guesswork during setup and production checks. It helps ensure proper thread engagement for critical assemblies, lowers rework and scrap, and supports consistent performance across parts and suppliers.