The JBO Thread Plug Gauge is a precision inspection tool built for metric coarse threads. It’s ideal for engineers, machinists, and quality teams who need a fast, reliable way to verify threaded holes without guesswork. Designed for Go/No-Go testing, this gauge confirms holes meet the M20 x 2.5 coarse-thread specification, helping ensure smooth assembly and consistent performance.

• Go/No-Go quick checks: Quickly determine whether a threaded hole accepts or rejects the gauge, speeding up quality inspections and reducing downtime on the shop floor.
• Hardened steel durability: Crafted for heavy use, the hardened steel construction withstands repeated insertions while maintaining long‑term accuracy.
• Standard metric sizing (M20 x 2.5, Right-Hand, 6G): Precisely matched to common metric coarse threads with a right-hand orientation, providing reliable, repeatable results across production runs.

In daily use, this gauge helps you catch mismatches early, cut waste, and maintain consistent thread quality. Its robust build and straightforward Go/No-Go operation fit seamlessly into routine inspection workflows, giving you confidence in component fit and reducing rework across assemblies.