The JBO Thread Plug Gauge (GO) is a precision inspection tool designed for internal UNC threads. It’s ideal for manufacturing, automotive, and aerospace environments where quick, reliable verification of threaded holes is essential. Sized for 2 3/4 x 4 and configured for right-hand UNC threads, this GO gauge helps ensure every hole meets Unified Thread Standard specifications with consistent results.

Designed with practical shop use in mind, this gauge features a built-in no-go design that speeds the identification of non-conforming threads. The result is faster quality checks, fewer errors during assembly, and smoother production workflows.

• Precise UNC Go Gauge (2B tolerance): Calibrated for Unified Thread Standard UNC right-hand threads with 2B tolerance to deliver accurate acceptance checks and reliable compatibility with standard fasteners.
• No-Go design for quick defect detection: The integrated no-go feature allows rapid spotting of out-of-spec holes, reducing inspection time and preventing incorrect assemblies from advancing.
• Ergonomic, durable construction: Knurled grip and robust design provide secure handling in busy environments, enabling repeatable measurements with less fatigue.

This gauge supports faster, more confident threaded-hole inspections, helping you maintain consistent quality, shorten QC cycles, and ensure every threaded connection performs as intended in demanding applications.