The JBO Thread Plug Gauge is a UNJF Go-No-Go tool designed to verify right-hand threads in 3B class, 7/16 x 20 size. Built for manufacturers, automotive shops, and aerospace maintenance teams, it provides a straightforward way to confirm threaded holes meet Unified thread standards.

Its go/no-go design delivers fast, objective feedback—you’ll know at a glance if a hole conforms or requires adjustment, helping keep production moving and assemblies accurate.

• Go/No-Go conformance testing: Quickly determine if a threaded hole meets spec by testing against the minimum (Go) and maximum (No-Go) limits, speeding inspections and reducing guesswork.
• UNJF 3B right-hand thread, 7/16 x 20 size: Delivers precise, repeatable checks aligned with Unified thread standards, ensuring reliable results across parts and assemblies.
• Durable, ergonomic construction: Knurled body and robust ends provide a secure grip and long service life in busy workshops, even with frequent use and tight spaces.

Using the JBO Thread Plug Gauge helps streamline quality control, reduce rework, and ensure consistent fitment in assemblies. The objective go/no-go checks minimize ambiguity, improving workflow, reliability, and confidence in every production run—whether you’re building precision components for aerospace, automotive, or general manufacturing.