The JBO Thread Ring Gauge (GO) – Metric Fine, Left Hand, 6g, M28 x 1 is a precision external-thread gauge built to verify metric fine threads quickly and reliably. Designed for machinists, quality teams, and production professionals, it helps confirm that M28 x 1 left-hand threads meet exact size and tolerance requirements with consistent results.

• Precise metric fine threading (M28 x 1, 6g): Enables fast go/no-go checks to ensure parts meet exact size and tolerance, reducing guesswork and rework in assembly and inspection.
• Hardened steel construction: Delivers durable, wear-resistant performance for long service life in busy workshops and demanding environments.
• Left-hand GO gauge design for fast QC: Specifically sized for left-hand threads, streamlining inspections and speeding up quality control workflows without compromising accuracy.

This gauge supports efficient quality control by providing a straightforward, reliable reference for external thread diameters. Its durable build and precise dimensions help you maintain consistent results across batches, minimize downtime, and boost confidence in every threaded component you produce or verify.