The JBO Thread Plug Gauge (GO) - Metric Fine is a precision inspection tool designed to verify internal threads in metal components. Built for engineers, machinists, quality control teams, and workshop technicians, it confirms that threaded holes meet the M42 x 2 specification with a 6H tolerance for reliable fits. Made from hardened steel, this GO gauge resists wear and retains calibration through busy, demanding use.

• Precise M42 x 2 GO check: Quickly verify that a threaded hole accepts the GO plug gauge, confirming it meets the M42 x 2 size and 6H tolerance for reliable assembly.
• Hardened steel for durability: Crafted from hardened steel to resist wear and maintain accuracy in daily workshop use, extending calibration life.
• Right-hand design for quick, consistent checks: Ensures predictable engagement and fast pass/fail results during inspections, with intuitive handling for faster workflows.

Using the JBO Thread Plug Gauge speeds threaded-hole inspections, reduces guesswork, and supports higher-quality assemblies. Its durable construction helps teams maintain reliable calibrations across shifts, promoting smoother workflows and fewer rework cycles when validating M42 x 2 holes.