The JBO Thread Plug Gauge is a precision inspection tool designed for metric fine threads, specifically tuned for M28 x 1. This right-hand, 4H gauge is ideal for machinists, quality teams, and assembly technicians who need reliable thread verification to ensure parts fit together smoothly.

Durable construction with hardened steel and a knurled grip delivers long-lasting performance in busy workshops. The Go/No-Go design enables quick pass/fail checks of threaded holes, so you can verify fit without guesswork and keep production moving.

• Go/No-Go Quick-Check Design: Quickly verify hole threads meet tolerance, enabling fast pass/fail decisions and reducing rework.
• M28 x 1 Metric Fine Thread Compatibility: Engineered for metric fine threads, ensuring accurate checks for mating components and assemblies.
• Hardened Steel Construction with Knurled Grip: Durable, wear-resistant body with a secure, comfortable grip for repeated use in busy workshops.

Using the JBO Thread Plug Gauge helps you streamline quality control, minimize downtime, and achieve consistent results across production runs. Its reliable go/no-go performance provides confidence during setup, inspection, and final assembly, supporting precise craftsmanship every time.