JBO Thread Ring Gauge (NoGo) - Metric Fine - Right Hand - 6g - M4 x 0.25 is a precision tool for verifying external thread diameters on fasteners, fittings, and machined components. It’s designed for engineers, inspectors, buyers, and workshop crews who need quick, reliable conformance checks to ensure parts meet industry standards and maintain consistent quality.

Crafted from hardened steel, this NoGo ring gauge is built for durability in demanding environments. The metric fine thread configuration, 6g tolerance, and right-hand orientation support repeatable measurements, while the user-friendly design makes it easy to identify non-conforming threads at a glance—helping quality control stay efficient and accurate.

• Precise metric fine threading (M4 x 0.25): Enables accurate verification of external threads to the exact spec, supporting compliance with industry standards and reducing rechecks.
• Durable hardened steel construction: Delivers long tool life and reliable performance in busy workshops, resisting wear from repeated use.
• NoGo design for fast conformance checks: Allows quick identification of out-of-tolerance threads, speeding inspections and improving workflow efficiency.

Using the gauge helps you quickly validate external threads against the 6g tolerance and M4 x 0.25 pitch, reducing mismatches, rework, and downtime. Its rugged construction provides dependable service across many inspection cycles, delivering consistent results batch after batch and enhancing overall quality control across your operation.