The JBO Thread Plug Gauge is a precision go/no-go inspection tool designed for UNF right-hand threads. It’s sized for 1 1/4 x 12 and graded to 2B accuracy, helping you verify threaded holes against Unified thread standards with confidence.

Created for manufacturing, automotive, and aerospace environments, this compact gauge supports fast, reliable checks without trial fittings, enabling quick pass/fail decisions and reducing rework in high‑volume workflows.

• Go/No-Go Quick Verification: The go side confirms acceptable fit while the no-go side flags non-conforming holes, delivering fast, clear results that speed up quality checks and minimize guessing.
• UNF Right-Hand 1 1/4 x 12, 2B Accuracy: Precisely prepared to the UNF standard with 2B tolerance, ensuring repeatable, dependable checks across parts and batches.
• Dual-Ended Design with Knurled Grip: One compact tool covers both GO and NO-GO checks in tight spaces; the knurled surface provides a secure grip even with gloves, reducing slips and setup time.

Using this gauge helps you confirm thread quality early in the production flow, cut inspection time, and improve assembly reliability. Its durable construction stands up to daily shop use, while its straightforward operation makes it suitable for both new technicians and seasoned inspectors. By delivering clear pass/fail results, it supports consistent thread quality, fewer rejects, and faster final assembly across your projects.