Spi 37-141-9 Plug Thread Gage M2x0.4 6H No Go

Product Description

The SPI 37-141-9 is a single-end plug thread gage configured as a No Go member, designed to verify that an internal M2x0.4 thread does not exceed the maximum material condition tolerance allowed under the 6H classification. Metrology technicians and quality control inspectors use this gage to reject threaded holes that are too tight or improperly formed, ensuring threads meet dimensional conformance before assembly. The gage pin measures 0.08 inches in diameter and 0.92 inches in height. It ships without a handle, which must be sourced separately and is sized to match the gage diameter. Traceability documentation conforming to ANSI standards traceable to NIST is included.

This gage is suited for precision inspection environments including machine shops, manufacturing floors, and quality labs working with metric fastener applications in the M2 size range. The No Go member is used in conjunction with a Go gage to perform a complete 6H thread acceptance test. It is appropriate for both production-line sampling and incoming inspection of threaded components such as small fasteners, instrument housings, and electronic assemblies where M2x0.4 threads are specified.

Key Features

• No Go plug gage member for M2x0.4 internal thread inspection
• 6H tolerance class per standard metric thread gage classifications
• Single-end configuration for straightforward pass/fail No Go inspection
• ANSI traceability certification traceable to NIST included with gage
• Handle not included — compatible with standard gage handles sized for the gage diameter
• Lightweight at 0.044 pounds for easy bench or hand use

Compatibility

Designed for use with standard plug gage handles sized to accept the gage pin shank diameter. Intended for inspection of M2x0.4 internal threads to 6H tolerance class.

Installation Notes

Installation of this gage into a handle should be performed per the handle manufacturer's instructions, ensuring the pin is fully seated and secure before use. Do not force the No Go gage into a conforming thread — the gage should not enter a correctly formed 6H thread. Store the gage in a protective case away from contaminants and temperature extremes to maintain dimensional accuracy. Periodic recalibration is recommended per your facility's quality management system requirements.