Spi 34-477-0 Threaded Ring Gage M7 X 1.00 Class 6G Go

Product Description

The SPI 34-477-0 is a single-ring threaded ring gage designed to verify external thread dimensions on M7 x 1.00 metric fasteners and threaded components. This is a Go gage, meaning it confirms that a threaded part falls within the lower tolerance boundary of a Class 6G fit — the part must pass through the gage to be accepted. Manufactured from Oil Hardened Non-Shrinking Steel (OHNS), also known as tool steel, the gage resists wear and maintains dimensional stability under repeated use. An NPL Traceability Certification is included, supporting quality assurance documentation requirements in inspection environments. Machinists, QC inspectors, and tool and die professionals use this gage in production and incoming inspection workflows.

This gage is used wherever M7 x 1.00 metric external threads must be verified to Class 6G tolerance. Typical applications include production floor thread inspection of bolts, studs, and threaded shafts in automotive, aerospace, and general manufacturing settings. The Go ring gage is used in combination with a matching No Go gage (sold separately) to fully verify thread form and tolerance. Suitable for both bench inspection and floor-level quality control checks.

Key Features

• Go-type single ring gage for M7 x 1.00 metric thread verification
• Class 6G tolerance classification for external threads
• Constructed from Oil Hardened Non-Shrinking Steel (OHNS) for wear resistance and dimensional stability
• NPL Traceability Certification included for documentation and quality system compliance
• Single-ring design for straightforward pass/fail go gauging

Compatibility

Designed for use with M7 x 1.00 metric externally threaded components requiring Class 6G go-gage inspection. Intended for use alongside a corresponding No Go ring gage for complete thread tolerance verification.

Installation Notes

Thread ring gages are handled and used by machinists and quality control inspectors — no installation in a mechanical system is required. Store the gage in its protective case when not in use to prevent damage to the precision-ground thread form. Apply a light coat of clean instrument oil before use to reduce wear and protect the gage surface. Follow your facility calibration schedule and re-certify the gage at intervals appropriate to your usage frequency and quality system requirements.