Vermont Gage 112118300 Class Zz Plus Plug Gage 18.3mm

Product Description

The VERMONT GAGE 112118300 is a Class ZZ Plus plug gage designed for dimensional inspection of bored holes and machined features at 18.3 mm diameter. Manufactured from tool steel, it holds a tolerance of 0.00508 mm and a 10 microfinish surface finish, delivering the precision required for go inspection in production and quality-control environments. At 2.0000 inches overall length, the gage is sized for bench use and hand-held inspection routines. Each unit ships with a Certificate of Accuracy that carries NIST traceability, supporting calibration documentation requirements in ISO and AS9100 regulated shops. Machinists, quality technicians, and metrology personnel use this gage to verify that a bore will accept the correct mating component.

This plug gage is suited for go inspection tasks where tight diameter control at 18.3 mm must be verified quickly and repeatedly. Typical applications include checking drilled, reamed, or bored holes in production machining, tool and die, and precision fabrication. It is also appropriate for setting and verifying micrometers, verniers, and other measuring devices requiring a traceable reference standard. The gage performs equally well in job shop and high-volume production settings where part-per-part verification is required.

Key Features

• 18.3 mm nominal diameter for direct go inspection of bored holes
• Class ZZ Plus tolerance of 0.00508 mm for tight dimensional control
• 10 microfinish surface for consistent, repeatable gage contact
• Tool steel construction for wear resistance and dimensional stability
• 2.0000 inches overall length suits standard bench and hand-held inspection use
• NIST-traceable Certificate of Accuracy included for calibration recordkeeping
• Conforms to ASME B89.1 standards

Compatibility

Designed as an OEM-style precision reference gage for go inspection of 18.3 mm diameter bored, drilled, or reamed features, and for use as a setting standard with micrometers, verniers, and other measuring devices.

Installation Notes

Plug gages are handled and used by qualified quality technicians or machinists and do not require permanent installation. Clean the gage and the bore thoroughly before use to prevent false readings caused by chips or coolant residue. Never force the gage through a bore; light hand pressure is sufficient for go inspection. Store the gage in its case away from temperature extremes to maintain dimensional stability and protect the calibrated surface finish.