The JBO Thread Plug Gauge is a precision inspection tool designed for metric fine threads. Whether you’re in a machine shop, quality lab, or maintenance facility, it helps you verify that internal threads are within spec before assembly.

Built for reliability, this gauge targets M1.8 x 0.2 right-hand threads with 4H tolerance, using a Go/No-Go design so you can quickly confirm both fit and clearance in a single check. The hardened steel construction delivers long-lasting performance in demanding environments.

• Go/No-Go design: Enables fast, confident hole verification with clear pass/fail results to speed up quality checks.
• Rugged, hardened steel construction: Ensures long service life in busy workshops, with a knurled grip for secure handling.
• Specific fit for metric fine threads (M1.8 x 0.2, 4H, right-hand): Delivers precise go/no-go checks for the exact thread profile used in your components.

Using this gauge helps you control quality at the source: quickly verify threads, reduce assembly retries, and maintain consistent results across production runs. Its durable construction and targeted accuracy make it a dependable addition to any threading workflow.