The JBO Thread Ring Gauge (GO) for UNEF, Left Hand, 2A in the 1/4 x 32 size is a precision tool designed to verify external threads quickly and reliably. It’s ideal for engineers, machinists, inspectors, buyers, and hobbyists who need to confirm that threaded components meet UNEF standards with confidence.

• Hardened steel construction: Built to withstand daily use in busy shops with excellent wear resistance, providing long-lasting, repeatable measurements over time.
• Precise UNEF GO sizing (1/4 x 32): Delivers reliable go/no-go verification of external threads against the UNEF standard, helping you confirm correct fit fast.
• Left-hand thread compatibility (2A): Specifically engineered for left-hand threads to ensure accurate inspection and reduce misreads in specialized applications.

The JBO GO Ring Gauge streamlines your inspection workflow: quick, clear go/no-go checks lead to faster decisions, fewer reworks, and consistent thread quality across batches. Its durable construction and precise sizing support reliable performance in demanding environments, giving you the confidence to deliver parts that meet exacting specifications every time.