The JBO Thread Plug Gauge (GO) - Metric Fine is a precision Go gauge designed to verify metric fine threaded holes. Specifically configured for M58 x 4 with a 6H tolerance and right-hand thread, this gauge helps inspectors and machinists confirm that a hole will accept a true fastener and meet required standards.

Made from hardened steel, the gauge resists wear and maintains accurate dimensions even in busy workshops. The knurled, cylindrical body provides a secure grip for quick insertion and removal, making it ideal for QA checks, production lines, and maintenance rounds across automotive, machinery, and general engineering applications.

• Metric fine GO gauge for M58 x 4 (6H): Precisely checks the minimum threaded hole size for standard metric fine threads, enabling fast go/no-go verification and consistent results across parts and shifts.
• Hardened steel construction: Heat-treated to resist wear, providing long tool life and stable measurements in busy shop environments.
• Ergonomic, user-friendly design: Knurled handle and smooth insertion make quick checks easy, with clear pass/fail indication to keep production moving.

Using the JBO GO gauge for M58 x 4 right-hand metric fine threads helps you verify hole quality quickly, reduce inspection time, and maintain tight tolerances throughout your manufacturing or repair workflow. With its durable construction and straightforward operation, you can rely on consistent results, minimize rework, and keep your quality control processes running smoothly.