Spi 34-495-2 Threaded Ring Gage M16x1.5 Metric Class 6G Go

Product Description

The SPI 34-495-2 is a single-ring threaded ring gage designed to verify external thread conformance on M16 x 1.50 metric fasteners and threaded components. Classified as a Go gage to Class 6G tolerance, it checks that a threaded workpiece falls within the acceptable maximum material condition limit. Manufactured from Oil Hardened Non-Shrinking Steel (OHNS), the gage delivers the dimensional stability and wear resistance required for production floor and quality control environments. An NPL Traceability Certification is included, supporting calibration documentation requirements in ISO-compliant and regulated manufacturing settings.

This gage is used in machining, fabrication, and assembly operations where M16 x 1.50 metric threads must be verified against Class 6G tolerance standards. Typical applications include incoming inspection, in-process thread verification, and final quality checks on threaded parts, bolts, shafts, and fittings. Machinists, quality control technicians, and metrology professionals install and use this gage as part of a standard thread inspection program. It is a single-ring design intended for Go verification only and is typically paired with a No-Go ring gage to complete the full acceptance check.

Key Features

• Go gage configuration checks that threads meet the maximum material condition for Class 6G external metric threads
• M16 x 1.50 thread size with metric thread form
• Class 6G tolerance classification for general-purpose metric external threads
• Oil Hardened Non-Shrinking Steel (OHNS) construction for dimensional stability and long service life
• NPL Traceability Certification included for use in calibrated, documented quality systems
• Single-ring design for dedicated Go verification

Compatibility

Designed for use with M16 x 1.50 metric externally threaded workpieces requiring Class 6G Go thread verification. Suitable for production and inspection applications governed by applicable metric thread standards.

Installation Notes

Thread ring gages are handled and applied by machinists and quality technicians following established metrology procedures. Store the gage in its protective case when not in use and keep it clean and lightly oiled to prevent corrosion. Do not force the gage onto a workpiece thread; resistance indicates the thread is out of tolerance or the gage requires re-calibration. Periodic re-calibration against traceable standards is recommended to maintain measurement integrity.