The JBO Thread Plug Gauge (GO) – Metric Fine, Right Hand, 6H, M90 x 4 is a purpose-built tool for quickly confirming that threaded holes meet exact metric specifications. Designed for use in quality control, manufacturing, and maintenance environments, this GO gauge helps you verify hole acceptance with a simple, reliable plug test.

Crafted from hardened steel for lasting durability, it stands up to daily use in high-volume workshops. The precision construction ensures consistent results, making it an essential part of your inspection routine for threaded components and assemblies.

• Precision-ground hardened steel construction: Built to withstand daily wear in busy shops, delivering accurate GO checks over a long service life.
• Metric Fine standard (M90 x 4, 6H) with right-hand thread: Matches common metric hole specifications for dependable, repeatable inspections and easy compatibility with your existing gauges.
• Fast, clear go/no-go verification: Enables quick identification of properly threaded holes, reducing inspection time and helping prevent misfits in assemblies.

Used in quality control to verify thread acceptability, this gauge supports faster workflows, minimizes rework, and provides consistent results across operators and shifts. Its reliable performance helps you maintain tight tolerances and confident, repeatable inspections from incoming parts to final assemblies.