The JBO Thread Plug Gauge is a UNC Go-No/Go gauge built for left-handed 1 1/4 x 7 threads. It helps inspectors and machinists quickly verify threaded holes meet Unified standards, delivering reliable pass/fail results for fast, confident measurements.

• Go/No-Go quick checks: Fast pass/fail verification of UNC left-handed threads 1-1/4 x 7, reducing inspection time and rework.
• Left-Hand UNC 1-1/4 x 7 with 2B tolerance: Precisely machined to UNC standards with 2B tolerance, ensuring consistent measurements and proper fitment across parts.
• Durable, ergonomic construction: Knurled grip and robust metal ends provide secure handling, long life in busy workshop environments, and repeatable results across cycles.

Using this gauge streamlines QC workflows: you can quickly confirm hole readiness, minimize guesswork, and support quality programs in manufacturing, automotive, and aerospace settings. Its reliable dimensions and rugged design help teams achieve consistent results, reduce downtime, and protect critical assemblies from mismatched threads.