Vermont Gage 112321410 Class Zz Plus Plug Gage 21.41mm

Product Description

The VERMONT GAGE 112321410 is a Class ZZ Plus plug gage machined from tool steel for dimensional inspection of bored holes and machined features at 21.41 mm nominal diameter. It carries a tolerance of 0.00508 mm, meeting ASME B89.1 accuracy standards for go inspection work. The gage ships with a Certificate of Accuracy traceable to NIST, making it suitable for calibrated measurement environments. Overall length is 2.0000 inches. Machinists, quality technicians, and metrology professionals use this gage to verify hole diameter acceptance before assembly or final inspection sign-off.

This plug gage is used in production and inspection settings where hole diameter conformance must be confirmed using a physical go gage method. Typical applications include verifying bored, reamed, or drilled holes in metal components during in-process or final inspection. It is also used to set and verify the calibration of micrometers, verniers, and other comparative measuring devices. The 10 micro surface finish on the gage pin supports accurate, repeatable contact with the workpiece bore surface.

Key Features

• Class ZZ Plus tolerance class at 0.00508 mm for precision go inspection
• Nominal diameter of 21.41 mm for direct hole size verification
• Tool steel construction for hardness and wear resistance in production use
• 10 micro surface finish on gage pin for consistent bore contact
• Meets ASME B89.1 dimensional gage standards
• Includes Certificate of Accuracy with NIST traceability for calibrated environments

Compatibility

Designed for go inspection of 21.41 mm diameter bored, reamed, or drilled holes, and for setting micrometers, verniers, and other comparative measuring instruments requiring a reference standard of this diameter.

Installation Notes

Plug gages are handled and used by quality technicians and machinists following standard metrology practices. Store the gage in its protective case when not in use and keep it clean and lightly oiled to prevent corrosion on the tool steel surfaces. Never force the gage into an undersized bore, as this will damage both the gage pin and the workpiece. Periodic recalibration against NIST-traceable standards is recommended to maintain measurement integrity over time.