The JBO Thread Ring Gauge (NoGo) — Metric Fine, Right Hand, 6h, M40 x 1 — is a precision tool for verifying external thread diameters. Designed for engineers, machinists, inspectors, and maintenance teams, it provides a fast, reliable pass/fail check to ensure components conform to the M40 x 1 standard.

Crafted from hardened steel, this NoGo gauge is built to withstand daily use in busy workshops. Its rugged construction delivers long-lasting performance, while the ring design enables quick, intuitive identification of non-conforming threads—helping you minimize rework and keep production moving.

• Fast NoGo verification for metric fine threads: Quickly confirm external threads meet the M40 x 1 specification; a non-fit indicates out-of-spec parts, speeding up QC and reducing rework.
• Rugged hardened steel construction: Designed for durability in demanding environments, resisting wear to maintain accurate measurements across thousands of inspections.
• Spec-aligned design for quick, confident checks: Right-hand orientation with 6h, matching standard metric fine threads so setup is straightforward and results are consistent.

Using this gauge streamlines your thread inspection workflow by delivering clear, repeatable results. It helps shorten measurement time, reduce guesswork, and improve batch-to-batch consistency. With its durable build and precise sizing, you can count on reliable performance across shifts, making quality control easier and more dependable for your manufacturing, assembly, and service operations.