The JBO Thread Plug Gauge is a UNEF Go-No/Go right-hand plug gauge sized for 5/16 x 32 threads. Specifically designed for quick, reliable inspections of threaded holes, it’s a practical choice for manufacturing, automotive, and aerospace environments where precise thread validation matters.

This gauge uses a straightforward Go/No-Go design to instantly indicate whether a thread hole meets the Unified standard. It helps inspectors and technicians confirm proper fitment without trial assemblies, speeding up quality checks and reducing rework.

• Go/No-Go design for fast conformance checks: quickly distinguish compliant from non‑conforming threads, keeping inspections efficient and accurate.
• Right Hand, 2B, 5/16 x 32 UNEF specification: precise, standards-based gauging at the exact size and orientation needed to verify internal threads.
• Durable knurled construction with reliable ends: robust, non-slip handling and long-lasting performance in daily shop use.

Whether you’re performing incoming inspections, in-process quality control, or routine maintenance, the JBO Thread Plug Gauge helps you deliver consistent results, save time, and maintain confidence in thread integrity across your production workflow.