The JBO Thread Plug Gauge is a precise go-no-go tool designed to verify UNF threaded holes quickly and reliably. Built for professionals in manufacturing, automotive, and aerospace, it helps ensure threads are within spec before components move to the next stage of assembly.

This Right Hand gauge is sized No. 3 x 56 and configured for 2B class threads. The go/no-go design enables inspectors to rapidly identify conforming versus non-conforming threads, supporting accurate fitment and consistent performance across parts.

• Go/No-Go dual ends: Instantly reveals whether UNF threads are within tolerance, speeding inspections and reducing guesswork in busy shop environments.
• UNF Right-Hand, 2B, No. 3 x 56 sizing: Precisely matches standard UNF threads to the 2B specification, helping ensure reliable assembly and proper function of threaded components.
• Ergonomic, durable construction: Knurled body and robust ends provide secure handling and long service life in demanding settings, minimizing downtime due to worn or damaged gauges.

With the JBO Thread Plug Gauge, your team gains faster, more consistent thread verification, smoother QA workflows, and greater confidence that threaded holes will accept the intended fasteners on first assembly—reducing rework and improving overall manufacturing reliability.