Spi 34-267-5 Plug Thread Gage 5/16-32 6H No Go

Product Description

The SPI 34-267-5 is a single-end No Go plug thread gage designed to verify that an internal thread does not exceed its maximum material condition. Manufactured from steel and conforming to ANSI standards, this gage checks 5/16-32 threads to the 6H tolerance class. It is a precision inspection tool used in production and quality-control environments to reject out-of-tolerance tapped holes before assembly. A Size 1 handle is required for use but is not included with this gage. A NIST traceability certification is included, supporting documentation requirements in calibrated inspection programs.

This plug thread gage is used in machine shops, manufacturing facilities, and maintenance departments wherever 5/16-32 tapped holes must be verified against 6H class tolerance limits. The No Go member confirms that an internal thread has not been cut oversize or damaged beyond the allowable tolerance. Typical applications include aerospace, automotive, and general industrial assembly lines where thread integrity is critical to fastener retention and joint reliability.

Key Features

• No Go single-end design checks maximum material condition of internal 5/16-32 threads
• 6H classification meets ANSI tolerance requirements for general-purpose metric and unified thread inspection
• Steel construction provides durability for repeated use in production environments
• NIST traceability certification included for calibrated inspection and documentation compliance
• Conforms to ANSI and NIST standards for thread gage accuracy
• Size 1 handle compatible — handle sold separately

Compatibility

Designed for use with a Size 1 plug thread gage handle (not included). Suitable for inspecting any internal 5/16-32 thread where 6H class tolerance verification is required.

Installation Notes

Thread gages are installed and operated by quality-control inspectors or machinists trained in precision measurement. Before use, ensure the gage and the threaded workpiece are clean and free of burrs, chips, or cutting fluid that could affect the reading. The No Go member should not enter a conforming thread — if it does, the tapped hole is out of tolerance and must be rejected or reworked. Store the gage in its protective case when not in use to prevent wear and maintain calibration integrity.