The JBO Thread Plug Gauge (GO) for UNC threads is a precision inspection tool designed to verify internal thread holes quickly and reliably. Its go/no-go design helps technicians confirm whether a threaded hole conforms to Unified thread standards, ensuring proper fitment for the fasteners used in your assemblies.

Designed for a wide audience—engineers, buyers, shop-floor technicians, and maintenance teams across manufacturing, automotive, and aerospace—the GO gauge makes thread verification straightforward. The GO end allows immediate identification of properly formed threads, reducing guesswork and preventing costly rework in your quality checks.

• Go design for fast go/no-go verification: Quickly determine if a threaded hole meets spec; a smooth GO entry signals compliant threads, while resistance indicates a deviation that needs correction.
• UNC standard size: 2 1/2 x 4, Right Hand, 2B: Precisely matched to common Unified National Coarse threads in the right-hand direction, supporting reliable compatibility with standard fasteners and assemblies.
• Precise dimensions for repeatable results: Meticulous design and tight tolerances deliver consistent measurements across inspections, boosting confidence in part quality and traceability.

Using this gauge helps streamline inspection workflows, reduce downtime associated with undetected thread faults, and ensure every hole is ready for assembly—supporting reliable performance across production lines and service environments.