The JBO Thread Plug Gauge is a precision inspection tool designed for metric fine threads. It provides a fast, reliable way to verify threaded holes in assemblies, making it ideal for machinists, engineers, quality inspectors, and workshop professionals. Its Go/No-Go design lets you quickly confirm both the acceptable and out-of-tolerance limits, helping you avoid misfits and costly rework. This model is specifically tuned for M12 x 1.25 right-hand threads with a 6H tolerance, ensuring compatibility with common metric components.

• Go/No-Go quick checks: The dual-ended design allows you to confirm the hole meets the required 6H M12x1.25 tolerance in a single pass, speeding setup and reducing guesswork during inspection.
• Durable hardened steel construction: Built to endure daily use, the hardened steel resists wear and maintains accurate limits, providing reliable performance across many inspections.
• Ergonomic knurled grip: A textured, non-slip handle and robust end sections enable secure handling and precise alignment, even while wearing gloves or working in tight spaces.

Designed to streamline your quality checks, this gauge helps you verify correct thread engagement quickly, minimize downtime, and ensure consistent results across production runs. Its rugged construction and targeted metric fine-thread compatibility translate to confident purchases, fewer disruptions, and a smoother path from inspection to finished assembly.