The JBO Thread Ring Gauge (GO) for UNC threads is a precision go gauge designed to verify external thread diameters quickly and reliably. Sized for Right-Hand UNC threads in class 3A tolerance, No. 1 x 64, this gauge is ideal for engineering shops, manufacturers, and QC labs that require fast, accurate pass/fail checks on threaded components.

Crafted from hardened steel, the JBO Ring Gauge delivers exceptional durability and wear resistance in demanding environments. Its user-friendly design makes it easy to identify properly conforming threads at a glance, supporting efficient quality control workflows and precise engineering work.

• Go Gauge for UNC External Threads: Quickly confirms components meet the Go limit for right‑hand UNC threads, speeding inspections and reducing the risk of out‑of‑spec parts advancing in production.
• Hardened Steel Construction: Built to last in busy workshops, resisting wear and maintaining dimensional stability for long-term accuracy.
• Easy Identification of Conforming Threads: Clear, intuitive feedback helps inspectors decide pass/fail fast, improving consistency across shifts and training time for new staff.

The JBO Thread Ring Gauge keeps threading inspections efficient and dependable, helping you improve throughput, cut rework, and ensure consistent results across batches while meeting UNC 3A standards. Use it as a reliable reference on assembly lines, maintenance checks, and quality control processes to verify external thread diameters with confidence.