The JBO Thread Ring Gauge (NoGo) is a precision external thread gauge designed to verify UNF threads. Sized for left-hand threads in the 2A class, No. 12 x 28, it’s a reliable tool for quality inspectors, machinists, and engineers in manufacturing, automotive, and aerospace. Its NoGo design provides quick visual confirmation of non-conforming threads, helping ensure proper fitment and reducing rework.

• NoGo design for fast conformance checks: Quickly identify non-conforming external threads, speeding up inspections and reducing the risk of incorrect assemblies.
• UNF Left-Hand 2A No. 12 x 28 precision: Delivers accurate sizing validation aligned with Unified standards, ensuring reliable verification of the targeted thread geometry.
• Hardened steel construction for durability: Built to endure daily use in demanding environments while maintaining long-term measurement accuracy.

Using the JBO Thread Ring Gauge (NoGo) streamlines quality control by delivering clear, actionable pass/fail results during thread inspections. The combination of precise UNF left-hand sizing and rugged construction minimizes downtime, supports consistent results across parts, and gives teams confidence that threaded components will assemble correctly in the field.