Vermont Gage 112412390 Class Zz Minus Plug Pin Gage 12.39mm

Product Description

The VERMONT GAGE 112412390 is a Class ZZ Minus plug pin gage designed for precise dimensional inspection of bored holes, machined openings, and other internal features. Built from steel with a 10 microfinish surface coating, this pin gage measures a nominal diameter of 12.39 mm and carries a tolerance of 0.00508 mm. The minus designation indicates the gage is ground to the lower end of the tolerance range, making it the correct choice for NoGo inspection applications. A Certificate of Accuracy with NIST traceability is included, supporting quality control documentation requirements in precision manufacturing and metrology environments. Machinists, quality technicians, and calibration professionals install and use this gage in production and inspection settings.

This pin gage is suited for NoGo inspection of holes and bores where precise dimensional acceptance criteria must be verified. It is also used to set and verify micrometers, verniers, and other measuring devices. The 12.39 mm diameter and Class ZZ tolerance class make it appropriate for applications requiring tightly controlled dimensional verification in both shop-floor and metrology lab environments. The included NIST-traceable Certificate of Accuracy supports ISO and AS9100 quality system documentation needs.

Key Features

• Class ZZ Minus tolerance class: 0.00508 mm tolerance ground to the lower tolerance boundary
• 12.39 mm nominal measurement diameter for precise bore and hole inspection
• 10 microfinish surface coating for accurate, repeatable contact with inspected surfaces
• Steel construction for durability in production inspection environments
• Certificate of Accuracy with NIST traceability included for quality system compliance
• Overall length of 2 inches for standard hand-held gage use

Compatibility

Designed for NoGo inspection applications and for setting micrometers, verniers, and other measuring devices requiring a 12.39 mm reference standard.

Installation Notes

Pin gages are handled and used by quality technicians and machinists trained in precision measurement practices. Store the gage in its protective case and apply a light coat of oil when not in use to prevent corrosion. Clean the gage and the feature being inspected before use to avoid debris-induced measurement error. Never force a pin gage into a hole; if resistance is felt, evaluate the hole before proceeding.