The JBO Thread Plug Gauge is a precision inspection tool designed for metric coarse threads. It helps engineers, machinists, buyers, and quality teams quickly verify that threaded holes meet exact standards before assembly, reducing misfits and rework. This right-handed plug gauge covers M3 x 0.5 threads with a 6G tolerance and is crafted from hardened steel for durable, long-lasting performance in demanding workshop environments.

• Go/No-Go quick checks: The go/no-go design provides fast, unambiguous feedback so you can confirm hole tolerance in seconds without guesswork.
• Metric coarse thread compatibility: Specifically sized for M3 x 0.5 coarse threads (6G), ensuring consistent fit and interchangeability across parts and assemblies.
• Hardened steel with knurled grip: Built to withstand daily use in busy shops, while the knurled surface offers a secure, comfortable grip for precise alignment and repeatable testing.

Using this plug gauge streamlines quality checks, shortens inspection time, and improves assembly reliability. Its robust construction reduces downtime and replacement costs, while clear Go/No-Go feedback helps teams maintain consistent, high-quality results across production runs.