Spi 37-196-3 Double End Go No Go Plug Thread Gage

Product Description

The SPI 37-196-3 is a double-end plug thread gage used to verify internal M14x1.5 metric threads to 6H tolerance class. One end checks the Go condition to confirm minimum material condition and proper thread form. The opposite No Go end confirms the thread has not been cut oversized. This gage ships with a handle included and carries an ANSI traceability certification traceable to NIST standards. Machinists, quality control inspectors, and precision tool technicians use this instrument in production and inspection environments where metric thread acceptance criteria must be documented and repeatable.

This plug gage is suited for inspecting M14x1.5 internal threads in manufactured components, machined housings, and threaded assemblies. The double-end design consolidates both Go and No Go checks into a single tool, reducing changeover time on the inspection bench. The 6H classification is the standard tolerance class for general-purpose metric fastener threads and is commonly specified in automotive, industrial, and mechanical assembly applications.

Key Features

• Double-end design with Go and No Go gaging elements in one tool
• M14x1.5 thread size with 6H tolerance class for general-purpose metric thread inspection
• ANSI traceability certification traceable to NIST included
• Handle included — no separate handle purchase required
• Compact form factor at 5.13 inches in length for bench and line use

Compatibility

Designed for inspection of M14x1.5 internal threads manufactured to 6H tolerance class per ANSI and NIST-referenced standards.

Installation Notes

This is a precision inspection instrument, not a mechanical component — no power source or shutoff is required for use. Handle the gage carefully to avoid drops or contact with abrasive surfaces that can alter the gaging elements. Clean the thread being inspected before gaging to remove chips, burrs, or cutting fluid that could produce false readings. Periodic recalibration against traceable standards is recommended to maintain measurement integrity.