The JBO Thread Ring Gauge (GO) for UNC right-hand threads is a precision tool designed to verify external thread diameters in the 9/16 x 12 size, class 2A. It’s ideal for machine shops, manufacturing lines, automotive, aerospace, and maintenance operations that require quick, reliable thread checks.

Crafted from hardened steel, it resists wear and maintains accurate measurements under daily use, delivering durable performance and consistent conformance verification across many inspections.

• Precise UNC GO validation: Quickly verify external thread size for right-hand UNC threads (9/16 x 12, 2A) to make fast pass/fail decisions during inspection and assembly.
• Rugged hardened steel construction: Built to resist wear and maintain accuracy under daily use, delivering long service life in demanding workshops.
• Clear, user-friendly conformance check: Simple, intuitive indication of properly formed threads to speed QC workflows and reduce downtime.

Designed to integrate into standard inspection workflows, this gauge helps reduce rework, minimize scrap, and ensure reliable thread engagement across assemblies. With dependable performance and durable materials, it supports consistent results from first checks to routine QA, giving you confidence in every part that leaves your shop.