Vermont Gage 112312530 Class Zz Plus Plug Gage 12.53mm

Product Description

The VERMONT GAGE 112312530 is a Class ZZ Plus plug gage designed for precision dimensional inspection of bores and holes at a nominal diameter of 12.53 mm. Built from tool steel with a 10 microfinish surface coating, this gage delivers a tolerance of 0.005 mm (0.00508 mm actual), making it suitable for go inspection workflows where tight dimensional control is required. Licensed metrology technicians, machinists, and quality control professionals use this type of gage to verify that bored or reamed features fall within specification before parts advance in production. Each unit ships with a Certificate of Accuracy traceable to NIST, supporting documentation requirements in ISO and AS9100 quality systems.

This plug gage is intended for go inspection of machined holes and bores in manufacturing and metrology environments. It is also used to set and verify micrometers, verniers, and other measuring devices requiring a known reference standard. Typical applications include incoming inspection, in-process quality checks, and final dimensional verification on parts produced in job shops, production machine shops, and precision manufacturing facilities. The 2.0000-inch overall length suits standard handle configurations used in bench and floor inspection setups.

Key Features

• Class ZZ Plus tolerance class — 0.005 mm tolerance for go inspection applications
• Tool steel construction with 10 microfinish surface coating for wear resistance and dimensional stability
• NIST-traceable Certificate of Accuracy included with each gage
• Manufactured to ASME B89.1 standards
• 12.53 mm nominal diameter with 2.0000-inch overall length
• Suitable for setting micrometers, verniers, and other measuring devices

Compatibility

Designed for use as a go plug gage for 12.53 mm diameter bores; also compatible for setting and referencing micrometers, verniers, and other precision measuring devices as stated in product application data.

Installation Notes

Plug gages are handled and used by quality technicians and machinists — no permanent installation is required. Store the gage in its protective case when not in use to prevent surface damage and corrosion. Clean the gage and the bore being checked before use to ensure accurate readings. Avoid dropping or applying side loads to the gage, as impact can alter the precision ground surface and invalidate the calibration certificate.