The JBO Thread Plug Gauge is a precision tool designed to verify metric fine threaded holes. It uses a Go/No-Go design to quickly confirm that M4 x 0.25 threads meet the required size and tolerance, making it ideal for quality checks during manufacturing, assembly, and maintenance. This gauge is tailored for right-hand threaded holes, helping you confirm proper fit every time.

• Go/No-Go design for fast, confident hole checks: Quickly determine if a threaded hole meets spec without trial assembly, speeding up inspections and reducing bottlenecks on the shop floor.
• Specifically tuned for metric fine threads (M4 x 0.25) with right-hand geometry: Designed to align with common metric fine-thread applications, ensuring accurate hand-fit verification in everyday projects.
• Hardened steel construction for durability and long life: Built to withstand regular use in busy environments, resisting wear and preserving reliable measurements over time.

Designed to support reliable, repeatable checks, the JBO Thread Plug Gauge helps you improve workflow accuracy, cut down rework, and maintain consistent results across batches. With its durable build and precise Go/No-Go functionality, you can trust it to protect fit quality from first part to final assembly.