JBO Thread Plug Gauge is a precision tool designed to verify metric fine-thread holes quickly and accurately. It’s ideal for engineers, machinists, inspectors, buyers, and hobbyists who need reliable hole sizing to ensure components with M1.4 x 0.2 threads mate cleanly and consistently.

Crafted for durability, this gauge uses hardened steel to stand up to daily workshop use, delivering steady performance and long-lasting accuracy even in demanding environments.

• Go/No-Go design for fast, confident checks: Quickly determine if a hole meets the thread size requirements, reducing inspection time and eliminating guesswork.
• Hardened steel construction for long life: Built to resist wear, preserving accuracy across repeated inspections and extended service life.
• Metric fine threading compatibility (M1.4 x 0.2): Precisely sized to verify tight-tolerance holes, helping ensure reliable fits and consistent assembly quality.

In practice, this plug gauge streamlines your quality checks, trims downtime, and supports repeatable results across batches. It’s a practical, dependable tool that helps your team deliver accurate, high-quality threaded assemblies with confidence.