Vermont Gage 302137030 Plug Thread Gage M16x1.5 6H

Product Description

The VERMONT GAGE 302137030 is a double-end plug thread gage designed to verify internal M16x1.5 metric threads to the 6H tolerance class. The Go end checks that a threaded hole falls within the minimum acceptable limit, while the No Go end confirms the hole has not been cut oversize. The Go pitch diameter is 15.02 mm and the No Go pitch diameter is 15.21 mm. Manufactured from tool steel for wear resistance and dimensional stability, this gage ships with a handle included. It is used by machinists, quality control technicians, and precision manufacturing shops performing thread inspection on metric fastener applications.

This gage is suited for incoming inspection, in-process quality checks, and final inspection of M16x1.5 threaded holes in both production and maintenance environments. The 6H classification corresponds to a standard internal thread tolerance widely used in general-purpose metric fastener assemblies. The double-end design places the Go member on one end and the No Go member on the opposite end of the same handle, reducing tool changeover during inspection runs. A size 3 handle is included and is ready to use out of the box.

Key Features

• Double-end design with Go and No Go members on a single size 3 handle
• Go pitch diameter: 15.02 mm for minimum thread acceptance verification
• No Go pitch diameter: 15.21 mm for maximum thread boundary verification
• Tool steel construction for dimensional stability and extended service life
• NIST traceability certification included for calibration recordkeeping
• Conforms to 6H internal thread tolerance classification

Compatibility

Designed for inspection of M16x1.5 internal threads manufactured to the 6H tolerance class in standard metric fastener and threaded-hole applications.

Installation Notes

Thread gages are used by quality control and machining professionals and require no permanent installation. Before use, clean the gage members and the threaded hole being inspected to remove chips, coolant, and debris that could affect readings. Do not force the Go or No Go member into the thread; apply hand pressure only. Store the gage in its protective case when not in use to preserve calibration integrity.