The JBO Thread Ring Gauge (GO) — Metric Fine, Right Hand, M42 x 1 is a precision go/no-go tool designed to verify external thread diameters quickly and reliably. It’s ideal for machinists, quality inspectors, and production teams who need to confirm that components with M42 x 1 threads meet exact specifications during inspection, assembly, or QA processes.

Manufactured from hardened steel, this gauge is built to withstand the wear and demands of busy workshops. A knurled outer edge provides a secure grip for easy handling and repeatable measurements, even in tight spaces.

• Go/No-Go Quick-Check for M42 x 1 Fine Threads: Enables fast pass/fail verification of thread size, speeding quality checks and reducing guesswork in the inspection process.
• Durable Hardened Steel Construction: Delivers long-lasting accuracy and wear resistance, suitable for daily use in demanding environments and high-volume workflows.
• Right-Hand Metric Fine Specification: Precisely matches the M42 x 1 right-hand thread standard, ensuring reliable conformance results with standard tooling and fixtures.

This gauge helps streamline your quality control, reduce downtime, and provide confident, consistent results across production runs. Use it to verify thread conformity early in the manufacturing cycle, minimize rework, and maintain tight dimensional control on critical assemblies.