The JBO Thread Plug Gauge (GO) is a precision tool designed to quickly verify threaded holes in a wide range of parts and assemblies. This metric fine GO gauge is specifically tuned for M55 x 1.5 left-hand threads, helping quality control teams confirm correct tapping and threading in automotive, industrial, and manufacturing environments.

Manufactured from hardened steel, the gauge combines durability with stable dimensions, standing up to daily use in busy workshops and service centers. Its clear, robust finish makes it easy to identify a good hole at a glance.

• Exact metric Go Gauge for M55 x 1.5 Left-Hand Threads: Delivers reliable go/no-go checks, ensuring holes meet the 6H standard and reducing rework.
• Hardened Steel Construction for Longevity: Withstands repeated insertions and everyday handling, preserving dimensional accuracy and extending tool life.
• User-Friendly Go Gauge for Fast Inspections: Designed for easy insertion and quick identification of acceptable holes, speeding up quality checks and reducing downtime.

This plug gauge helps inspectors and machinists confirm hole readiness with confidence, streamlining QC workflows and supporting consistent, high-quality assemblies. Its durable build and precise dimensions translate to fewer rejects, faster setups, and improved overall manufacturing performance.