The JBO Thread Plug Gauge is a precision inspection tool designed for metric coarse threads. This Left Hand version confirms M8 x 1.25 threaded holes meet exact size and pitch requirements, helping ensure reliable fitment during assembly and maintenance.

Designed for fast, reliable checks, the go/no-go design lets you quickly verify both tolerance and engagement without extensive measurement steps.

• Go/No-Go design for fast, reliable checks: Quickly determine whether a hole meets the correct size and pitch, enabling instant pass/fail decisions and reducing inspection time.
• Metric coarse thread compatibility: M8 x 1.25, 6G: Specifically tailored for metric coarse threads, ensuring accurate verification of thread engagement and fit.
• Hardened steel for durability: Built to withstand daily shop use, delivering long-lasting performance and consistent results through many inspections.

By delivering clear pass/fail results for M8 x 1.25 left-hand threads, the JBO Thread Plug Gauge helps you validate hole quality during machining, assembly, and maintenance. The combination of precise Go/No-Go checks and rugged construction means fewer rework, faster approvals, and reliable performance across daily inspections.