The JBO Thread Ring Gauge (GO) for UNF — Right Hand — 3A — 1 x 12 is a go/no-go gauge that helps you verify external thread diameters quickly and reliably. It’s ideal for machinists, quality inspectors, and shop-floor teams aiming to confirm that threaded components conform to the UNF standard and maintain consistent performance in assemblies.

Constructed for durability, the gauge is made from hardened steel to withstand daily use in demanding environments. The knurled outer surface provides a secure grip for easy handling, even with gloves, while the simple geometry makes pass/fail decisions straightforward during routine inspections.

• Go/No-Go quick-check: Easily determine if a thread meets the GO dimension at a glance, speeding up inspections and reducing rework.
• Hardened steel construction: Built to endure heavy use, resist wear, and maintain accuracy over time in busy workshops.
• UNF size 1 x 12 Right-Hand 3A accuracy: Precisely matched to the UNF 1 x 12 right‑hand standard, delivering repeatable, compliant checks for reliable quality control.

This gauge supports efficient quality control by providing a clear, reliable reference for external threads. Use it to streamline workflows, improve part fit, and ensure consistent results across batches, helping you meet tight production schedules with confidence.