Vermont Gage 111284400 Class Zz Minus Plug Pin Gage 0.8440 in

Product Description

The VERMONT GAGE 111284400 is a Class ZZ minus plug pin gage used to verify that a bored or reamed hole does not exceed its maximum allowable size. Built from steel, this pin gage measures 0.8440 inches in diameter with a tolerance of 0.0002 inches and an overall length of 2 inches. It ships with a Certificate of Accuracy backed by NIST traceability, confirming the gage meets the dimensional requirements for Class ZZ minus classification. Machinists, quality control technicians, and tool-and-die professionals use this type of gage as part of go/no-go inspection routines in production and inspection environments.

This plug pin gage is suited for NoGo inspection applications where confirming a hole is within maximum material condition is required. It is also appropriate for setting micrometers, verniers, and other measuring devices that need a traceable reference standard at the 0.8440-inch diameter. Typical use environments include machine shops, inspection labs, and manufacturing floors where tight-tolerance hole inspection is part of standard quality workflow.

Key Features

• Class ZZ minus classification for NoGo inspection of holes at 0.8440 inches diameter
• Tolerance of 0.0002 inches ensures consistent, reliable measurement
• Steel construction provides durability in shop and lab environments
• 10 micro surface finish coating supports accurate contact measurement
• Includes Certificate of Accuracy with NIST traceability
• Compact 2-inch overall length for easy handling in tight inspection setups

Compatibility

Designed as an OEM-style plug pin gage for use in go/no-go inspection setups, and compatible for setting micrometers, verniers, and other measuring devices requiring a traceable 0.8440-inch diameter reference.

Installation Notes

This gage is handled and used by machinists and quality technicians, not installed in the traditional sense. Store the pin in its protective case when not in use to prevent surface damage that could affect measurement accuracy. Clean the pin and the bore being inspected before use to avoid false readings caused by debris or coolant residue. Never force a plug gage into a hole, as this can damage the gage surface and invalidate its traceability certification.