The JBO Thread Ring Gauge (GO) for BSP (G) threads is a precision Go gauge designed to verify external thread diameters on fittings, pipework, and components. Sized for 1 1/8 x 11 with tolerance class A, it’s tailored for left-hand BSP (G) applications and is ideal for plumbers, engineers, and quality inspectors who need quick, reliable pass/fail checks during assembly or maintenance.

With its exacting design, the Go gauge helps you confirm that threads are formed correctly and will seal properly, reducing rework and minimizing leak risk in critical systems.

• Go design for fast conformance checks: Quickly determine whether a thread diameter falls within BSP (G) tolerances, speeding inspections and helping you keep projects on track.
• Precise sizing for BSP G left-hand threads: Engineered to BSP G 1 1/8 x 11 with tolerance class A, delivering reliable acceptance criteria so fittings thread together with confidence.
• Durable, grip-friendly construction: Robust ring with a knurled exterior for secure handling and long service life in demanding workshop or field conditions.

This gauge streamlines your workflow by providing immediate, objective results, enabling faster assembly checks, reducing downtime, and helping your team deliver consistent, leak-free connections. By confirming conformance early, you protect equipment, minimize warranty issues, and boost overall reliability across plumbing, fluid handling, and engineering applications.