The JBO Thread Ring Gauge (GO) for UNF, Left Hand, 2A, 3/4 x 16 is a precision GO gauge designed to verify external thread diameters to the 3/4 x 16 UNF left-handed standard. It’s ideal for manufacturers, machine shops, QA teams, and inspection personnel who need quick, reliable conformance checks on threaded components.

Made from hardened steel, this gauge is built to endure daily shop use, resisting wear and maintaining accurate measurements over time. Its left-hand orientation and 2A tolerance class align with standard inspection workflows, enabling fast verification of properly finished threads.

• Precise UNF GO fit: Provides fast, repeatable go/no-go checks for 3/4 x 16 UNF left‑hand external threads, helping you confirm part conformity at a glance.
• Hardened steel durability: Built to withstand everyday use in busy workshops, delivering long service life and stable measurements in challenging environments.
• Easy-to-use design: Simple alignment with threads and clear conformance cues support quick inspections, reducing downtime and speeding up quality control.

Using this gauge helps streamline inspection workflows, reduces rework, and improves consistency across batches. With durable construction and straightforward feedback, it supports reliable, efficient quality control for threaded components.