The JBO Thread Plug Gauge is a precision inspection tool designed to verify UNEF threads in holes and threaded components. With a 5/8 x 24 UNEF specification and a 2B tolerance, this go-no-go gauge is built for reliable performance in manufacturing, automotive, and aerospace environments. Its ergonomic, two-ended design makes it ideal for busy shops where quick, repeatable checks are essential.

• Go/No-Go design for fast pass/fail checks: Quickly determine if a hole meets the 5/8 x 24 UNEF spec, reducing inspection time and the risk of misfits.
• Two-end go/no-go testing: One end tests the go limit and the other the no-go limit, delivering clear, unambiguous results for consistent quality.
• Ergonomic, durable construction for reliable use: Knurled metal body with a secure grip stands up to daily workshop use while preserving measurement accuracy.

Using the gauge promotes tighter quality control, faster approvals on part clearance, and dependable inspections that help prevent assembly delays. It supports repeatable results across jobs, giving your team confidence that threaded holes will meet specifications before components are fitted.