Introducing the JBO Thread Plug Gauge (NoGo) - Metric Fine, Left Hand, 6H, M52 x 1. This precision tool is designed to verify threaded holes with metric fine threads, specifically for M52 x 1 left-hand holes with 6H tolerance. It’s ideal for machinists, inspectors, and quality teams who need quick, reliable checks for hole size and thread form without disassembly. Built to withstand daily workshop use, this NoGo gauge helps confirm holes meet the exact size standards across a range of industries.

The NoGo plug gauge is crafted for durability and consistent results. With hardened steel construction and a knurled body, it resists wear and provides a confident grip for fast alignment and repeatable checks—even in busy production environments.

• Matched to M52 x 1 left‑hand metric fine threads: Enables fast, accurate NoGo verification of hole size and thread form for precise quality control.
• Hardened steel construction: Delivers long life and reliable performance under demanding shop conditions with minimal maintenance.
• Ergonomic, knurled grip: Lets you insert and align the gauge quickly and securely, reducing setup time and operator fatigue.

Using this gauge in your QA process helps prevent undersized or oversized holes from passing, standardizes inspection across teams, and supports consistent, high-quality assemblies. It’s a reliable addition to any threaded-hole inspection routine, delivering repeatable results with ease.