Vermont Gage 302146530 Plug Thread Gage M20x2.5 6H

Product Description

The VERMONT GAGE 302146530 is a double-end plug thread gage designed to verify M20x2.5 internal threads to 6H tolerance class. One end carries the Go member with a pitch diameter of 18.37 mm; the opposite end carries the No Go member at 18.60 mm pitch diameter. The gage body is manufactured from tool steel for dimensional stability and wear resistance under repeated use. A handle is included in the package. Inspection technicians and machinists use this gage to confirm that threaded bores fall within the accepted tolerance window before parts move to assembly or shipping.

This gage is suited for incoming inspection, in-process quality control, and final inspection of M20x2.5 threaded components in manufacturing, maintenance, and repair environments. Typical applications include verifying threaded holes in structural components, fixtures, and machined parts where 6H class fit is specified. The double-end configuration allows Go and No Go checks with a single tool, reducing changeover time on the inspection bench.

Key Features

• Double-end design combines Go and No Go members in one tool
• Go pitch diameter: 18.37 mm for minimum material verification
• No Go pitch diameter: 18.60 mm for maximum material verification
• Tool steel construction for long service life and dimensional stability
• NIST traceability certification included for calibration documentation
• Handle included — no separate handle purchase required

Compatibility

Designed for inspection of M20x2.5 internally threaded bores manufactured to 6H tolerance class per applicable metric thread standards.

Installation Notes

This gage is used by quality technicians and machinists during inspection — no installation into a mechanical system is required. Store the gage in its case when not in use to protect the precision ground members from damage. Clean threads in the workpiece before gaging to prevent debris from causing false rejections or wear to the gage members. Never force the Go end through a threaded bore; if resistance is felt, the part should be evaluated rather than the gage forced.