The JBO Thread Plug Gauge is a precision inspection tool designed for metric fine threads, making it essential for engineers, machinists, quality teams, and workshop technicians who require consistently accurate hole threads. It helps ensure components thread together smoothly by providing a quick, reliable check of internal threads before assembly or machining operations.

Designed for metric fine threading, this Go/No-Go gauge verifies holes to the M15 x 1.5 size with a right-hand configuration and 4H tolerance. Its hardened steel construction delivers enduring performance and wear resistance, while the knurled body provides a secure grip for precise handling in busy shop environments.

• Go/No-Go quick validation: speeds thread inspections with clear pass/fail results, reducing guesswork and downtime in production or repair workflows.
• Hardened steel construction: built to last under daily use, resisting wear and maintaining accuracy over many measurements.
• Metric fine thread compatibility (M15 x 1.5, Right Hand, 4H): ensures reliable, repeatable checks for the specific thread standard you rely on, supporting consistent part fitment.

Using the JBO Thread Plug Gauge helps you validate threads with confidence, streamline quality control, and prevent mismatches in assemblies. It delivers dependable measurements that translate into fewer reworks, faster setup, and improved overall performance across manufacturing, maintenance, and engineering tasks.