Spi 34-460-6 Threaded Ring Gage M2 X 0.40 Class 6G No Go

Product Description

The SPI 34-460-6 is a No Go threaded ring gage used to verify that an external metric thread does not exceed its maximum material condition. Manufactured from Oil Hardened Non-Shrinking Steel (OHNS), this single-ring gage is designed for M2 x 0.40 metric threads to Class 6G tolerance. It ships with an NPL Traceability Certification, confirming the gage has been calibrated against national measurement standards. Machinists, quality control technicians, and tool room professionals use this type of gage as part of a go/no-go inspection routine to catch out-of-tolerance threads before parts advance to assembly.

This gage is intended for inspection of small-diameter external metric threads in precision manufacturing, aerospace, medical device, and general machining environments. The M2 x 0.40 thread form and Class 6G classification make it appropriate for applications requiring medium-tolerance metric fastener verification. It is a single-ring design, meaning it functions as the No Go member of a mating pair. The companion Go ring gage is a separate tool.

Key Features

• No Go classification for detecting oversized or out-of-tolerance external threads
• M2 x 0.40 metric thread form to Class 6G tolerance
• Manufactured from Oil Hardened Non-Shrinking Steel (OHNS) for dimensional stability under repeated use
• NPL Traceability Certification included, supporting calibration documentation requirements
• Single-ring design for dedicated No Go inspection duty
• UNSPSC Code 41111619 for procurement and catalog classification

Compatibility

Designed for inspection of external metric threads with an M2 x 0.40 thread form meeting Class 6G tolerance specifications. Suitable for use in any quality inspection process requiring NPL-traceable thread gaging of this thread size and class.

Installation Notes

Threaded ring gages are handled by quality control technicians and tool room personnel, not field trade installers. Store the gage in its protective case when not in use to prevent damage to the precision thread form. Do not force the gage onto a thread — a No Go gage should not pass over a conforming thread, and resistance is expected. Periodically return the gage to a certified calibration lab to maintain traceability and confirm dimensional integrity.