JBO Thread Plug Gauge (NoGo) – Metric Fine is a precision inspection tool designed for metric fine threaded holes. This right-hand NoGo gauge is calibrated for M58 x 2 threads with 4H tolerance, making it ideal for machinists, inspectors, engineers, and workshop professionals who need fast, reliable hole-size checks.

Manufactured from hardened steel, it delivers durable, wear-resistant performance for daily use in demanding environments. The compact plug-gauge design enables quick, straightforward checks without removing or disassembling parts, helping keep production running smoothly.

• Metric fine, M58 x 2 alignment: precisely matched to metric fine thread standards so you’re checking the exact hole size your parts require, reducing misfits and rework.
• NoGo limit for maximum hole size: quickly confirms holes do not exceed the maximum allowable size, speeding quality control and catching out-of-tolerance components early.
• Hardened steel, durable construction: built to endure repeated use in busy shops, providing long-lasting performance and consistent readings over time.

Using the JBO Thread Plug Gauge (NoGo) helps streamline inspections, minimize downtime, and ensure threaded holes meet precise specifications. Its reliable design and clear measurement signals give teams confidence in every part they manufacture or assemble.