The JBO Thread Plug Gauge is a precision go/no-go tool designed to verify UNJC threaded holes quickly and reliably. It's ideal for manufacturers, automotive shops, and aerospace suppliers who need fast, accurate checks to confirm hole size and thread quality. With a right-hand orientation, 3B tolerance class, and No. 4 x 40 size, this gauge delivers consistent results across inspection tasks.

• Go/No-Go Quick Conformance Checks: The dual-ended design lets you instantly determine if a hole meets spec—go end slides into tolerance, while the no-go end prevents acceptance if out of tolerance—saving time and reducing rework.
• Durable, Easy-to-Use Construction: Rugged knurled body provides a secure grip in busy workshops, with color-coded rings near each end for fast orientation and reliable handling in challenging environments.
• Precise UNJC 3B, Right-Hand, No. 4 x 40 Size: Specifically matched to UNJC thread standards, this gauge ensures consistent measurements and compatibility with common hole sizes, supporting accurate inspections and repeatable results.

Using this gauge helps streamline your inspection workflow by delivering clear pass/fail results, reducing the need for further measurement, and improving first-pass quality. It supports quicker setup, fewer misfits, and smoother assembly processes across manufacturing, assembly, and quality control activities.