The JBO Thread Plug Gauge is a precision inspection tool designed for metric fine threads. This Left Hand version supports M16 x 1.5 threads with a 6H internal tolerance, making it ideal for engineers, machinists, and maintenance technicians who need reliable hole checks in a variety of applications. Its Go/No-Go design enables quick, objective verification of threaded holes, helping you confirm fit and consistency across assemblies.

Built for durability and consistent performance, this gauge uses hardened steel to resist wear and maintain accuracy over many uses in busy shop environments. The compact, dual-ended design provides easy handling and fast checks, while the knurled center section offers a secure grip for repeatable measurements.

• Go/No-Go, dual-ended inspection: Quickly confirm hole acceptance at both ends in a single check, speeding up quality control and reducing operator error.
• Hardened steel durability: Withstands repeated insertions and wear, preserving dimensional accuracy for long-term reliability in demanding workloads.
• Left Hand, metric fine thread compatibility: Specifically tuned for M16 x 1.5 fine threads (6H), ensuring precise checks for left-hand threaded components and reliable assembly fits.

This gauge helps you streamline workflows by delivering fast, confident pass/fail decisions, reducing rework, and ensuring consistent results across projects that rely on precise metric fine-thread fits.