The JBO Thread Ring Gauge (NoGo) is a precision inspection tool designed to quickly verify external UNF threads. It’s ideal for engineers, inspectors, machinists, buyers, and shop-floor teams who rely on accurate thread dimensions to ensure proper fit and reliable performance. Its built-in No-Go limit lets you identify non-conforming threads at a glance, reducing rework and assembly errors.

Constructed from hardened steel for long life, this gauge withstands daily use on busy production lines. It’s sized for UNF Right Hand 2A threads with a 9/16 x 18 specification, providing reliable cross-checks against industry standards and specifications in manufacturing, automotive, and aerospace environments.

• No-Go quick-conformance check: Quickly identify out-of-spec external threads with a simple go/no-go test, helping you detect non-conforming parts and prevent faulty assemblies.
• UNF Right-Hand 2A, 9/16 x 18 sizing: Precisely aligned with common UNF standards to ensure reliable, repeatable checks across parts and suppliers.
• Hardened steel construction: Durable and wear-resistant for long tool life on busy shop floors, maintaining accuracy over time.

Designed to streamline quality control, the JBO Thread Ring Gauge NoGo enables faster inspections, reduces downtime, and supports consistent thread engagement in assemblies. It helps teams make confident decisions, improve workflow, and deliver reliable results across manufacturing, automotive, and aerospace applications.