Spi 34-494-5 Threaded Ring Gage M14x2 Metric 6G No Go

Product Description

The SPI 34-494-5 is a single-ring threaded ring gage used to verify external thread dimensional conformance on M14 x 2.00 metric fasteners and threaded components. Classified as a No Go gage to Class 6G tolerance, it checks the maximum material condition of the thread form. A correctly machined thread should not fully enter this gage. Manufactured from Oil Hardened Non-Shrinking Steel (OHNS), the gage maintains dimensional stability through repeated use. NPL Traceability Certification is included, supporting quality management systems that require documented measurement standards. Machinists, quality technicians, and inspection personnel use this gage on the shop floor or in the inspection lab.

This gage is suited for production inspection and incoming quality control of metric threaded parts with an M14 x 2.00 thread form. Class 6G is a standard medium tolerance classification for external metric threads, making this gage appropriate for general-purpose fastener and component inspection in both job shop and manufacturing environments. It is used as part of a Go/No Go pair to confirm threads are within specification before assembly.

Key Features

• No Go ring gage confirms threads do not exceed maximum material limits for Class 6G tolerance
• M14 x 2.00 metric thread form for standard coarse-pitch metric fastener inspection
• Oil Hardened Non-Shrinking Steel (OHNS) construction for dimensional stability and wear resistance
• Single-ring design for dedicated No Go inspection use
• NPL Traceability Certification included for quality system compliance

Compatibility

Designed for inspection of external metric threads with an M14 x 2.00 thread form manufactured to Class 6G tolerance per metric thread standards.

Installation Notes

Threaded ring gages are handled and used by quality technicians and machinists performing thread inspection — no installation in a system is required. Keep the gage clean and lightly oiled when not in use to prevent corrosion and preserve accuracy. Do not force the gage onto a thread; resistance or binding indicates the part is out of tolerance. Store in a protective case away from temperature extremes to maintain calibration integrity.