The JBO Thread Ring Gauge (NoGo) is a precision tool designed to verify external thread diameters to UNJC standards. It’s an essential instrument for manufacturing, automotive, and aerospace environments where quick, reliable thread checks matter. The NoGo design makes non-conforming threads easy to spot, helping you prevent incorrect assemblies and reduce rework on the shop floor.

Designed for right-hand threads and sized as No. 4 x 40 with a 3B tolerance, this gauge is built to last. Crafted from hardened steel, it delivers durable, repeatable performance in demanding conditions, so you can rely on accurate inspections day after day.

• UNJC Right-Hand NoGo Gauge: Precisely matched to UNJC external threads and right-hand configurations, ensuring consistent, standards-compliant checks for reliable fitment.
• NoGo Design for Fast Pass/Fail Decisions: Clear non-conformity indication allows quick inspections, reducing downtime and speeding up quality control processes.
• Hardened Steel Construction: Tough, wear-resistant material that preserves dimensional accuracy and extends tool life in busy production environments.

With the JBO Thread Ring Gauge (NoGo) in your inspection toolkit, you’ll streamline quality checks, minimize misfits, and maintain consistent thread integrity across parts and assemblies. Its robust build and precise UNJC compatibility help you achieve dependable results, protect downstream assembly quality, and keep production moving smoothly.