The JBO Thread Plug Gauge is a precision inspection tool designed to verify internal UNEF threads in holes and assemblies. With a clear go/no-go design, it delivers quick, reliable checks that help quality teams, machinists, and inspectors confirm parts meet Unified thread standards. Ideal for manufacturing, automotive, and aerospace environments, this gauge supports fast acceptance decisions and consistent threaded-hole readiness.

Left-hand orientation and a size of 7/8 x 20 UNEF with a 2B tolerance class ensure you test the correct thread form and verify compatibility with standard fasteners. This combination helps you confidently validate hole readiness and prevents misfits in critical assemblies.

• Go/No-Go quick-check design: instantly identify conforming versus non-conforming threads, speeding inspections and reducing rework.
• UNEExc 7/8 x 20 left-hand, 2B tolerance: precisely matched to standard UNEF internal threads for accurate, repeatable measurements in critical holes.
• Ergonomic, durable construction with knurled grip: easy handling and reliable performance on busy shop floors, even when wearing gloves.

Using the JBO Thread Plug Gauge streamlines your quality checks, improves workflow efficiency, and helps you deliver consistently threaded parts with confidence. Its straightforward operation and robust design make it a dependable addition to any calibration or QC kit, supporting precise, repeatable results across multiple applications.