Spi 34-463-0 Threaded Ring Gage M2.5 X 0.45 Class 6G Go

Product Description

The SPI 34-463-0 is a single-ring threaded ring gage designed to verify the external thread form and fit of M2.5 x 0.45 metric fasteners and threaded components. This is the Go member of a Go/No-Go gage set, used to confirm that a male thread falls within the acceptable dimensional envelope for Class 6G tolerance. Manufactured from Oil Hardened Non-Shrinking Steel (OHNS), the gage delivers the hardness and dimensional stability required for consistent, repeatable inspection results. An NPL Traceability Certification is included, supporting calibration documentation and quality system requirements.

This gage is used in machine shops, manufacturing facilities, and quality control environments where metric threaded components must be verified against ISO tolerance standards. The Class 6G designation applies to general-purpose external metric threads and is the most commonly specified tolerance class for fasteners and threaded fittings. The 34-463-0 is suited for incoming inspection, in-process verification, and final inspection of M2.5 x 0.45 threaded parts across industries including aerospace, precision machining, and industrial assembly.

Key Features

• Go member confirms M2.5 x 0.45 external threads meet Class 6G minimum material condition
• Oil Hardened Non-Shrinking Steel (OHNS) construction for long service life and dimensional stability
• NPL Traceability Certification included for calibration and quality system documentation
• Single-ring design for straightforward thread verification workflow
• Metric thread form per ISO tolerance class 6G — the standard for general-purpose external threads

Compatibility

Designed for inspection of M2.5 x 0.45 metric external threads conforming to Class 6G tolerance. Compatible with any Go/No-Go gage inspection process where ISO metric thread standards apply.

Installation Notes

Threaded ring gages are used by quality technicians and machinists — no installation in the traditional sense applies. Store the gage in a clean, dry environment and apply a light coat of oil when not in use to prevent corrosion. Handle with care to avoid dropping, which can alter the gage geometry and invalidate calibration. Periodic recalibration against traceable standards is recommended to maintain measurement integrity.