The JBO Thread Plug Gauge (Go/NoGo) is a precision inspection tool designed to verify NPT threaded pipe connections. Sized for 1/4 x 18 right-hand threads, it helps plumbers, manufacturers, and inspectors quickly determine whether fittings will thread properly and seal as intended.

Built for reliability in busy environments, this gauge features a straightforward Go/No-Go design that lets you confirm conformance at a glance, speeding up quality checks and reducing rework during assembly and maintenance.

• Go/No-Go design for fast conformance checks: quickly distinguish between passing and non‑conforming threads, saving inspection time and boosting workflow efficiency.
• NPT 1/4 x 18 right-hand compatibility: precisely sized for common 1/4" NPT fittings, ensuring accurate measurement and reliable fitment in standard pipe systems.
• Hardened steel construction: durable, wear‑resistant material that maintains accurate dimensions through repeated use in demanding workshop environments.

Using the JBO thread plug gauge helps you validate thread quality during installation, sourcing, and servicing. It supports confident selection of fittings, reduces downtime from mismatches, and delivers consistent, repeatable results across projects.