The JBO Thread Plug Gauge is a go/no-go inspection tool designed for metric coarse threads. Specifically engineered for M4 x 0.7 coarse threads, it helps quality teams quickly verify threaded holes meet spec and will accept the intended components.

With a right-hand orientation and 6H tolerance, this gauge is built to withstand busy workshop use. The hardened steel construction offers lasting durability, ensuring reliable performance across numerous inspections and maintenance tasks.

• Go/No-Go accuracy: Quickly determine whether internal threads are within tolerance by testing both the go and no-go limits, speeding up quality checks and reducing rework.
• Metric Coarse thread compatibility: Precisely matched to M4 x 0.7 coarse threads to ensure correct hole acceptance and mating fit in standard assemblies.
• Rugged, durable construction: Hardened steel design stands up to repeated use in demanding environments, delivering consistent results over time.

This plug gauge simplifies inspection workflows, helping you confirm thread quality with confidence. Use it to minimize downtime, improve part compatibility, and maintain reliable performance across production and maintenance tasks.