Vermont Gage 112421530 Class Zz Minus Plug Pin Gage

Product Description

The VERMONT GAGE 112421530 is a Class ZZ minus plug pin gage designed for precision dimensional inspection in manufacturing and metrology environments. This single-end pin gage measures 21.53 mm in diameter and carries a tolerance of 0.00508 mm, meeting the tight control requirements of Class ZZ specifications. The minus designation indicates the gage is manufactured to the lower tolerance boundary, making it purpose-built for NoGo inspection applications. Machinists, quality technicians, and metrologists use this tool to verify that bores and holes do not exceed the maximum allowable dimension. Each gage ships with a Certificate of Accuracy traceable to NIST standards.

This plug pin gage is used in precision measurement workflows including NoGo bore inspection, setting micrometers, verniers, and other calibrated measuring devices. It is suited for use in machine shops, tool rooms, and quality control labs handling close-tolerance components. The 21.53 mm diameter targets metric-dimensioned bores commonly found in mechanical assemblies, fixtures, and precision-machined parts requiring verified dimensional conformance.

Key Features

• Class ZZ minus tolerance of 0.00508 mm for tight NoGo inspection control
• 21.53 mm measurement diameter for metric bore verification
• Overall length of 2 inches for standard hand-held use
• Steel construction for durability and dimensional stability
• 10 micro coating and finish for surface consistency
• Includes Certificate of Accuracy with NIST traceability

Compatibility

Designed for NoGo inspection applications and for setting micrometers, verniers, and other precision measuring devices requiring a certified reference standard at 21.53 mm.

Installation Notes

Pin gages should be handled with clean, dry hands or inspection gloves to prevent corrosion from skin oils. Store in the provided case or a clean dry environment away from temperature extremes to maintain dimensional accuracy. Verify the gage against its Certificate of Accuracy documentation before placing it into service in a calibrated inspection process. Periodic recalibration intervals should follow your shop or lab quality management plan.