The JBO Thread Plug Gauge is a precision inspection tool designed for metric coarse threads, specifically M20 x 2.5. This left-hand go/no-go gauge helps technicians, machinists, and maintenance staff quickly verify threaded holes for proper fitment. Built for professional environments, it supports consistent quality in manufacturing and repair tasks.

Designed for left-hand M20 x 2.5 coarse threads, this Go/No-Go gauge delivers fast, clear pass/fail checks to prevent misfits and costly rework. The gauge is crafted from hardened steel to withstand daily use and keep its accuracy over time.

• Go/No-Go test for M20 x 2.5 left-hand coarse threads: Quickly verify hole threads are within tolerance with a simple pass/fail check, helping prevent misfits and rework.
• Hardened steel construction for durability: Built to withstand daily workshop use and maintain calibration over many cycles.
• Ergonomic, knurled body for repeatable measurements: Easy to grip, even with gloves, providing stable handling and consistent results in tight spaces.

With the JBO Thread Plug Gauge, you gain faster, more reliable thread inspection that supports quicker setups, reduces downtime, and improves overall threading quality across parts. It’s a durable, dependable tool you can trust in busy workshops and quality control processes.