The JBO Thread Plug Gauge is a precision Go/No-Go tool designed for metric fine threads. Sized for M38 x 1 right-hand threads and the 6H tolerance class, it’s ideal for quickly checking threaded holes during fabrication, assembly, and maintenance to ensure a proper fit with mating parts.

Built with hardened steel for long-lasting wear resistance, this gauge stays accurate through frequent use in busy workshops. Its robust construction and straightforward Go/No-Go action let operators of all skill levels perform reliable inspections in seconds.

• Go/No-Go quick inspection: Effortlessly confirm whether the hole threads are within spec—go checks indicate accept, no-go checks indicate reject—so you move quickly from setup to production.
• Durable hardened steel construction: Engineered for wear resistance and stable measurements, delivering reliable performance through many cycles of use.
• Metric fine thread match (M38 x 1, right-hand, 6H): Precisely sized for the target thread and tolerance, providing repeatable checks with standard mating parts.

With the JBO Thread Plug Gauge, you gain confidence in every threaded connection. The quick Go/No-Go checks reduce inspection time, improve first-pass yield, and minimize downtime in production or maintenance environments. The hardened steel build ensures longevity, so one gauge serves many jobs—from project prototyping to high-volume assemblies. By ensuring threads meet the 6H class spec at M38 x 1 right-hand, you minimize rework and compatibility issues, helping you complete projects more efficiently and reliably.