The JBO Thread Ring Gauge (NoGo) is a precision inspection tool used to verify external thread diameters on fasteners, shafts, and threaded components. It's ideal for quality control teams, machinists, engineers, and technicians in manufacturing, automotive, and aerospace environments who need reliable, fast confirmation that parts meet thread standards.

Built to the exacting standards of trapezoidal thread form, right-hand orientation, and 7e tolerance (Tr. 12 x 3), this NoGo gauge delivers clear, quick pass/fail results. Its hardened steel construction stands up to daily shop-floor use, providing dependable gauging through many cycles without drift.

• Fast go/no-go verification: Quickly determine whether a thread is within spec by verifying unobstructed engagement with the Go setting and a non-fit with the NoGo, reducing inspection time and minimizing guesswork on the line.
• Precise trapezoidal, right-hand thread geometry: Machined to exact 7e tolerance with Tr. 12 x 3 size, ensuring consistent measurements and reliable compatibility with established thread standards.
• Durable hardened steel construction: Built for long life and repeated use, resisting wear and maintaining accuracy in busy production environments.

This gauge helps you streamline quality control, cut downtime, and improve fit reliability across assembled parts. By delivering clear, repeatable results, it supports tighter process control, faster approvals, and greater confidence from suppliers and customers alike.