The JBO Thread Ring Gauge (NoGo) is a precision inspection tool built to verify external threads to UNJF specifications. Sized for 5/16 x 24 left-handed threads and class 2A, this gauge is ideal for manufacturers, quality teams, and maintenance technicians who need fast, reliable confirmation that threaded components will mate correctly.

Crafted from hardened steel, the gauge combines durability with measurement accuracy to handle everyday shop use. Its NoGo design provides an immediate pass/fail indication, helping teams spot non-conforming threads quickly and prevent misfits in assemblies.

• NoGo verification for fast, go/no-go checks: Enables quick identification of non-conforming threads, reducing inspection time and preventing improper fits in assemblies.
• UNJF 5/16 x 24 Left-Hand, 2A-compatible sizing: Precisely aligned to the external thread engagement of the specified UNJF size and orientation, delivering consistent, dependable pass/fail decisions.
• Hardened steel construction for durability: Built to endure routine, high‑throughput use while maintaining accuracy and long service life in challenging workshop environments.

Using the gauge helps streamline quality control by delivering clear, repeatable measurements that support compliant, reliable performance across batches and applications, from manufacturing floors to aerospace maintenance. It reduces downtime, speeds inspections, and gives teams confidence that threaded parts meet the required standards for proper fit and function.