The JBO Thread Plug Gauge is a precision UNEF Go-No/Go gauge built for testing threaded holes across manufacturing, automotive, and aerospace applications. This dual-ended tool is designed for right-hand 15/16 x 20 threads and features a 2B tolerance, helping you quickly confirm whether a hole meets the exact UNEF specification.

With a sturdy, knurled body and robust ends, the gauge delivers reliable, repeatable results in busy shop environments, enabling fast pass/fail decisions without guesswork.

• Dual-Ended Go/No-Go Testing: Quickly verify both the acceptable threshold (Go) and non-conforming limit (No-Go) in a single instrument, speeding inspections and reducing misreads.
• UNEF 15/16 x 20 Right-Hand, 2B Tolerance: Precisely sized for Unified Extra Fine threads with the correct orientation and tolerances to ensure consistent hole acceptance across parts.
• Durable, Easy-to-Use Construction: Knurled body with robust ends provides a secure grip and long service life in demanding environments.

Designed to improve quality control and workflow, the JBO gauge speeds inspections, reduces guesswork, and helps you catch non-conforming threads early. By delivering consistent, repeatable measurements, it supports faster throughput, fewer returns, and higher confidence in every assembly.