The JBO Thread Plug Gauge is a precision tool designed for metric fine threads. It’s specifically calibrated for left-hand M26 x 2 threads, and uses a Go/No-Go design to quickly verify threaded holes for correct size and fit.

Built for reliability in machining, assembly, and maintenance environments, this gauge helps quality teams and shop floors confirm that components thread together cleanly and consistently, even under heavy use.

• Go/No-Go accuracy for fast acceptance checks: Quickly determine if a hole matches the M26 x 2 left-hand thread spec, speeding up quality control and reducing inspection time.
• Hardened steel construction for lasting durability: Toughened, wear-resistant body maintains precision measurements through repeated use in busy workshops.
• Designed for metric fine threads (6H tolerance): Precisely calibrated for metric fine thread standards to deliver reliable, repeatable checks on critical assemblies.

This gauge helps you verify holes quickly, reduce downtime, and ensure mating parts perform as intended, enabling smoother workflows and higher-quality threading results across manufacturing, maintenance, and repair tasks.