The JBO Thread Plug Gauge is a precision inspection tool designed for a wide range of industries, from manufacturing and automotive to aerospace. It verifies internal UNF threads quickly and reliably, helping you confirm hole quality without guesswork. This Go-No/Go gauge is specifically configured for right-hand threads in the 3/4 x 16 size range, with a 3B tolerance class to ensure consistent results across production runs.

• Go/No-Go dual-end design: enables instant pass/fail verification of threaded holes by testing both the “Go” and “No-Go” limits in a single tool, speeding inspections and reducing the risk of incorrect assemblies.
• UNF 3/4 x 16 right-hand sizing with 3B tolerance: aligned to Unified thread standards, delivering reliable, repeatable checks that help maintain interchangeability and part compatibility in assemblies.
• Durable, ergonomic construction: features a knurled central body with color-coded ends for quick orientation, providing a secure grip and long-lasting use in busy workshop environments.

Using this gauge supports a streamlined QA workflow: quick, definitive checks on hole suitability, fewer rejected parts, and faster production throughput. It helps ensure threaded components fit correctly, meet specifications, and perform reliably in finished assemblies.