The JBO Thread Plug Gauge is a precision inspection tool designed for metric coarse threads. Ideal for machinists, inspectors, and assembly teams, it quickly verifies threaded holes for proper fit and function using a simple go/no-go test. Sized for M1.2 x 0.25 coarse threads with a right-hand orientation, this gauge helps ensure components assemble correctly the first time.

Crafted from hardened steel, it stands up to daily wear in busy workshops and maintains accurate checks over many cycles. The sturdy construction and reliable geometry give you long-lasting performance you can trust in quality control and production environments.

• Go/No-Go inspection for fast, reliable checks: Quick pass/fail indication for threaded holes, reducing inspection time and preventing assembly errors.
• Hardened steel for durable, long-lasting use: Resists wear, maintains accuracy, and stands up to daily handling in workshop environments.
• Precisely sized for M1.2 x 0.25 coarse threads (5H, right-hand): Ensures consistent fit with standard components and reliable measurements across batches.

Used in daily manufacturing and maintenance, this gauge helps you validate hole sizes with confidence, speeding up setup and inspection. Its go/no-go action gives you an unambiguous pass or fail, so you can move on to the next part without second-guessing. The combination of metric coarse threading compatibility, right-hand orientation, and 5H tolerance ensures consistent results across parts, reducing rework and improving overall assembly quality.