Designed for engineers, machinists, quality teams, and hobbyists, the JBO Thread Ring Gauge (GO) for UNEF is a precision tool for checking external threads to the 15/16 x 20 Right-Hand, 2A specification. Made from hardened steel for lasting wear resistance, it delivers fast, reliable pass/fail checks that confirm parts thread on properly and meet required standards.

• Precise UNEF GO verification: Confirms external thread diameter and engagement against 15/16 x 20 Right-Hand 2A, delivering quick, unambiguous pass/fail results to speed setups and inspections.
• Hardened steel construction: Built to endure daily use in busy shops, resisting wear and maintaining calibration for long service life.
• User-friendly, knurled exterior: Easy to grip and position, enabling fast insertions and fewer handling errors during routine quality checks.

This ring gauge streamlines quality control by providing a reliable reference for external thread size, reducing guesswork, and helping ensure consistent fits across components. Its robust build and clear GO indication support faster throughput, lower downtime, and higher confidence in threaded assemblies.