The JBO Thread Plug Gauge is a precision inspection tool designed for metric fine threads. It helps engineers, machinists, quality inspectors, and technicians quickly verify that threaded holes meet exact specifications.

Designed for left-hand threads and sized M13 x 0.75 with a 6H tolerance, this Go/No-Go gauge delivers fast, reliable pass/fail checks to confirm proper assembly and fit.

• Go/No-Go Quick Verification: Provides fast, clear pass/fail results so you can identify out-of-tolerance holes in seconds, keeping production moving.
• Exact M13 x 0.75 Left-Hand Thread Match: Specifically calibrated for metric fine threads with 6H tolerance, ensuring accurate checks for the exact hole size and orientation.
• Durable Hardened Steel Construction: Built to withstand daily use in busy shops, resisting wear and maintaining accuracy over time.

Using this gauge helps speed up quality control, reduce rework, and improve overall threading reliability. Its straightforward Go/No-Go operation minimizes guesswork, supporting consistent results across parts and assemblies.