The JBO Thread Ring Gauge (GO) - Pg - Right Hand - Pg 21 x 16 is a precision tool used to verify external thread diameters during manufacturing, machining, and quality-control inspections. Its GO design provides a clear pass/fail indication, helping inspectors confirm that threaded components meet Pg 21 x 16 specifications quickly and reliably. Crafted from hardened steel for durability and wear resistance, this gauge maintains dimensional accuracy in demanding workshop environments and supports long service life.

• Precise GO gauge for accurate thread verification: Quickly determine if external threads conform to Pg 21 x 16, reducing guesswork and rework in QA processes.
• Hardened steel construction for durability: Built to withstand daily use in busy shops, resisting wear and maintaining accuracy over time.
• Right-hand orientation for fast, intuitive checks: Designed for straightforward setup and rapid identification of conforming parts, keeping inspection throughput high.

By delivering reliable, repeatable thread checks, this gauge speeds up quality control, minimizes downtime, and helps your team produce consistently accurate assemblies. The result is fewer misfits, quicker acceptance of good parts, and a smoother workflow from receiving to final QC.