The JBO Thread Ring Gauge (NoGo) is a precision measuring tool designed to quickly verify external UNF threads. Sized for 5/16 x 24 UNF with a right-hand thread and a 3A tolerance, it’s a reliable choice for manufacturing, automotive, aerospace, and quality inspection teams.

With its NoGo design, non-conforming threads are easy to spot, helping prevent mismatched parts and ensure proper fitment from the start. Crafted from hardened steel, this gauge stands up to daily use in demanding environments.

• Precise UNF Go/No-Go Verification: Quickly confirm the external thread size (5/16 x 24 UNF) with clear go/no-go indicators, enabling fast differentiation between conforming and non-conforming threads.
• Durable Hardened Steel Construction: Built to endure daily inspection work in busy shops, maintaining accuracy and extending the gauge’s life even under frequent use.
• Right-Hand 5/16 x 24 UNF 3A Design: Precisely matched to standard right-hand UNF threads with 3A tolerance, ensuring repeatable measurements and broad compatibility with common components.

This gauge helps you streamline quality checks, reduce rework, and maintain consistent results across batches. By delivering quick, reliable verification of thread standards, it supports faster throughput, safer fits, and confidence in every assembly.