The JBO Thread Plug Gauge is a precision Go/No-Go tool designed for metric fine threads. Sized for M28 x 1.5 with Right Hand orientation in the 6G class, it delivers quick, reliable checks to verify hole threads before assembly. It’s a practical choice for engineers, machinists, technicians, and hobbyists who need accurate, repeatable results.

Crafted from hardened steel, this gauge offers lasting durability in busy workshops and maintenance environments. The robust construction resists wear through repeated use, helping you maintain measurement accuracy and reduce inspection time over the long term.

• Go/No-Go quick hole checks: Instantly confirm whether a threaded hole passes or fails the spec, speeding up inspections and reducing rework by eliminating guesswork.
• Metric fine thread compatibility (M28 x 1.5, Right-Hand, 6G): Ensures consistent, repeatable fits across parts, helping you maintain tight tolerances and reliable assembly.
• Hardened steel construction: Delivers long-lasting durability and wear resistance in demanding workshop environments, maintaining accuracy over thousands of checks.

With its precise Go/No-Go design, durable construction, and exact metric sizing, the JBO Thread Plug Gauge helps you streamline quality control, improve fit consistency, and reduce downtime in manufacturing, maintenance, and repair workflows. Use it to quickly validate threaded holes before assembly, ensuring reliable performance and confidence in every project.