The JBO Thread Plug Gauge (GO) is a precision inspection tool designed for verifying metric fine threaded holes. Ideal for engineers, machinists, quality inspectors, and workshop professionals, this GO gauge helps quickly confirm that a hole accepts the minimum permitted thread, supporting consistent part quality and streamlined inspections.

Crafted from hardened steel, the JBO plug gauge offers exceptional durability and wear resistance to stand up to daily use in demanding environments. Its metric fine size—M128 x 2—with right-hand orientation and 6H tolerance is purpose-built to align with common threading standards, ensuring reliable, repeatable results across your production and QA processes.

• Fast, reliable GO verification: Quickly confirms hole acceptance for metric fine threads, shortening inspection times and reducing rework.
• Durable hardened steel construction: Built to endure frequent use, resisting wear to maintain accuracy and longevity.
• Metric fine M128 x 2, right-hand, 6H specification: Precisely matched to standard threads for consistent, repeatable gauging with standard tools and components.

Using the JBO Thread Plug Gauge (GO) simplifies quality control, helping you document conformance and minimize downtime. It supports precise, repeatable measurements, improves workflow efficiency, and gives your team confidence that threaded holes meet the required standards.