The JBO Thread Plug Gauge is a precision tool for verifying internal metric fine threads. It is specifically sized for M37 x 0.5 right-hand threads and designed for use with 6H hole tolerance, making it a reliable choice for quality-critical assemblies. It's ideal for machine shops, automotive environments, and manufacturing settings where thread fit truly matters.

Its Go/No-Go design lets you perform quick pass/fail checks on threaded holes, helping you identify out-of-tolerance conditions before assembly. Manufactured from hardened steel, the gauge resists wear and maintains accuracy through heavy daily use, delivering long-lasting reliability in busy workshops.

• Go/No-Go verification for fast checks: Quickly determine if a hole’s threads are within spec with a simple insertion and withdrawal, reducing inspection time and guesswork.
• Specifically matched to M37 x 0.5 metric fine thread: Precise sizing for this common fine-thread standard ensures consistent, reliable mating and quality control.
• Hardened steel construction for durability: Built to resist wear and maintain accuracy across thousands of inspections in demanding environments.

Using this gauge helps streamline your inspection workflow, shorten setup times, and improve overall thread quality across production runs. It provides dependable, repeatable results that support smoother assembly, reduced rework, and greater confidence in every part you verify.