The JBO Thread Ring Gauge (Go/NoGo) for NPT, Right Hand, 3 1/2 x 8 is a precision tool designed for professionals who work with threaded pipe connections. Ideal for engineers, plumbers, field technicians, buyers, and hobbyists, this gauge helps confirm that NPT fittings will thread together correctly and seal reliably.

Its meticulous design and precise dimensions enable quick, reliable inspection of threaded fittings, ensuring proper fitment and leak-free performance on every job.

• Go/No-Go quick verification: Quickly distinguish conforming from non-conforming threads, reducing inspection time and preventing misfits.
• NPT standard alignment: Precisely matches NPT thread specifications to help you verify proper fit and sealing tolerances with confidence.
• Rugged daily-use build: Designed for busy workshops and job sites, delivering consistent performance and long service life even in demanding environments.

Using this gauge streamlines your quality checks, minimizes downtime, and supports dependable, repeatable results across projects—from initial assembly to final testing. It gives you clear, tangible benefits: faster inspections, fewer reworks, and greater trust in every threaded connection you deploy.