The JBO Thread Plug Gauge is a Go/No-Go inspection tool designed for metric fine threads, specifically M12 x 1.5, with a right-hand thread and 6G tolerance. It enables quick, confident verification of threaded holes, ensuring fasteners seat correctly and assemblies stay within specification. Ideal for engineering shops, manufacturing lines, maintenance teams, and hobbyists alike, it streamlines quality control without guesswork.

Built for daily use in busy environments, this gauge combines a robust build with precise measurements. The hardened steel construction delivers long tool life and reliable readings even after repeated insertions, extractions, and cleaning. Its compact, knurled body provides a secure grip for fast, repeatable checks.

• Go/No-Go Quick Validation: Quickly confirm whether a hole is within spec by testing both minimum and maximum limits, reducing inspection time and rework.
• Metric Fine Thread Precision (M12 x 1.5): Specifically tuned for metric fine threads to deliver reliable checks and consistent mating with standard fasteners and components.
• Hardened Steel Durability: Rugged, wear-resistant construction ensures long tool life and dependable readings in demanding shop environments.

This plug gauge helps you deliver consistent, quality-assured assemblies fast. By speeding up hole verification, it reduces downtime, minimizes rework, and supports tighter tolerances across production or maintenance workflows. With reliable performance and a durable build, you can rely on accurate checks job after job.