The JBO Thread Ring Gauge (NoGo) — Metric Fine is a precision tool designed to verify external thread diameters on fasteners, fittings, and machined components. It helps inspectors, engineers, and workshop staff quickly determine whether threads meet exact specifications.

Designed for right-hand metric fine thread profiles, including M42 x 1.5, the NoGo gauge delivers durable, reliable performance in demanding environments—from production lines to workshops.

• Durable hardened steel construction: Built to withstand daily use in busy workshops, with excellent wear resistance that keeps dimensions stable and accurate over time.
• Clear NoGo design for fast checks: Quickly identifies non-conforming threads, speeding inspections and reducing rework in quality control processes.
• Precise metric fine threading (M42 x 1.5, right-hand, 4h): Provides reliable external thread verification that aligns with standard specifications and delivers repeatable results across parts.

With the JBO NoGo ring gauge, you gain confidence in every inspection: faster pass/fail decisions, fewer rejects, and consistent results that support tight manufacturing tolerances. Built for durability and ease of use, it helps streamline quality control workflows and protect production timelines.