Spi 37-175-7 Plug Thread Gage M36x4 6H Class Go

Product Description

The SPI 37-175-7 is a single-end Go plug thread gage designed for inspecting M36x4 internal threads to the 6H tolerance class. It is used to verify that a threaded hole falls within the acceptable maximum material condition limits, confirming the thread will accept a mating fastener. The gage body measures 1.42 inches wide by 2.13 inches tall and weighs 2.11 pounds. Handle is not included and must be sourced separately. Traceability certification is provided to ANSI standards with NIST traceability, making it suitable for quality control environments where documented measurement accuracy is required.

This gage is applied in manufacturing, machining, and maintenance environments where M36x4 threaded holes must be inspected for conformance before assembly. Typical users include machinists, quality control technicians, and tool-and-die professionals working with large-diameter metric threaded components. The Go gage member confirms minimum thread form and pitch diameter acceptability. It is appropriate for both production floor inspection and incoming inspection of machined parts in industrial settings.

Key Features

• Go member checks M36x4 internal threads to 6H tolerance class
• Single-end design for straightforward Go inspection workflow
• ANSI certification with NIST traceability included for documented quality assurance
• Handle not included, compatible with standard plug gage handles sold separately
• Compact form factor: 1.42 inches wide, 2.13 inches tall, 2.11 pounds

Compatibility

Designed as an OEM-style inspection tool for M36x4 internally threaded components held to 6H tolerance class per ANSI and NIST-traceable standards. No specific equipment compatibility data was provided by the manufacturer.

Installation Notes

This gage is installed by a qualified quality control technician or machinist using a compatible plug gage handle, which is not included and must be procured separately. Before use, ensure the threaded hole is clean and free of chips, coolant, or debris that could affect the gage reading. The gage should be stored in a controlled environment and periodically recalibrated in accordance with your facility quality system requirements. Do not force the gage into a non-conforming thread, as this can damage the gage member and invalidate its calibration.