The JBO Thread Plug Gauge is a precision inspection tool designed for metric fine threads. It helps machinists, engineers, buyers, and maintenance professionals quickly verify threaded holes are within spec.

Built for reliability, this gauge features a left-hand M33 x 1.5 thread with 6H tolerance and a robust Go/No-Go design that lets you confirm both minimum and maximum sizes in a single check, speeding setup and reducing guesswork.

• Go/No-Go quick inspection: Quickly verify both the minimum and maximum thread limits in one pass, enabling faster quality checks and fewer reworks.
• Hardened steel construction: Designed for demanding workshop use, delivering long life and sustained accuracy even after repeated use.
• Metric fine thread compatibility (M33 x 1.5, left-hand, 6H): Precisely matched to your application’s metric fine threads, ensuring reliable gauge results and consistent assemblies.

Use this gauge to speed up assembly, improve part-to-part consistency, and reduce downtime in manufacturing, maintenance, and repair tasks. Its durable build and exacting Go/No-Go checks give you confidence that each threaded hole meets the required specifications.