The JBO Thread Plug Gauge is a precision inspection tool designed for metric fine threads. It’s an essential companion for engineers, machinists, buyers, tradespeople, and hobbyists who need to verify internal threads quickly and with confidence. Specifically tuned for M10 x 1.25, 6H right-hand threads, it ensures you’re checking the correct class of hole during assembly.

This right-hand Go/No-Go gauge uses two ends to confirm both Go and No-Go limits, letting you finish more jobs in less time. Built from hardened steel, it resists wear and holds calibration through regular use.

• Go/No-Go design for fast, reliable checks: Verifies minimum and maximum thread limits in seconds, reducing guesswork and rework and speeding up quality control in manufacturing or repair tasks.
• Hardened steel construction for long life: Durable, wear-resistant body stands up to daily handling, maintaining accuracy over many cycles and resisting corrosion.
• Specifically calibrated for metric fine threads (M10 x 1.25, 6H, right-hand): Provides consistent, repeatable checks for common precision holes, helping you avoid mismatches and costly thread repairs.

With the JBO Thread Plug Gauge, you streamline thread inspection across assemblies, maintenance, and incoming quality checks. The Go/No-Go design delivers clear pass/fail results, so you can move parts through sourcing and assembly faster while reducing downtime. The hardened steel construction ensures reliable performance long after you unbox it, preserving calibration and reducing the need for replacements. Its compact, hand-held form makes it easy to carry on site or in a shop drawer, giving you confidence that every M10 x 1.25 hole meets the 6H standard before you assemble.