The JBO Thread Plug Gauge is a precision inspection tool designed for metric fine threads, specifically calibrated for M30 x 1 holes. Its Go/No-Go design lets you quickly verify hole size, and the left-hand configuration with 6H tolerance fits standard fixtures and quality requirements. Made from hardened steel, it delivers durable, long-lasting performance in busy workshop environments.

• Go/No-Go precision checks: Quick pass/fail verification for M30 x 1 threaded holes, speeding setup and quality inspection.
• Left-Hand configuration: Optimized for compatibility with left-handed thread setups and common fixtures, reducing setup time and the risk of cross-thread mistakes.
• Hardened steel construction: Durable, wear-resistant body that stands up to frequent use and maintains accuracy across many inspections.

By providing fast, reliable checks, the JBO Thread Plug Gauge helps you prevent misfits, shorten inspection times, and maintain consistent thread quality across batches. Its robust design and precise tolerances support repeatable results, making it a dependable tool in production, maintenance, and assembly tasks.