JBO Thread Plug Gauge - Metric Fine Go/No-Go, Left Hand, 6H, M3.5 x 0.35 is a precision inspection tool designed for metric fine threads. It helps engineers, machinists, buyers, and hobbyists quickly verify threaded holes to ensure parts fit together cleanly and reliably.

Designed for M3.5 x 0.35 metric fine threads with 6H tolerance, this gauge supports fast, repeatable checks that keep your workflow moving. Its Go/No-Go design lets you confirm acceptable hole size in seconds, reducing guesswork and rework. Crafted from hardened steel, it delivers lasting performance in busy workshop environments.

• Go/No-Go quick‑check for metric fine threads: Verify hole size rapidly to ensure proper fit and reduce setup time and rework.
• Left Hand thread suitability: Specifically designed to accommodate left-hand threaded components, preventing cross‑threading and mismatches.
• Hardened steel construction: Built for durability and wear resistance, delivering reliable performance through heavy use.

This plug gauge helps you maintain consistent thread quality across parts and batches, speeds up inspection during assembly and QA, and gives you the confidence to move projects forward with minimal downtime.