Vermont Gage 112320130 Class Zz Plus Plug Gage 20.13mm

Product Description

The VERMONT GAGE 112320130 is a Class ZZ Plus plug gage machined from tool steel for precise dimensional inspection of bored holes and internal features. It checks whether a hole meets minimum acceptable size, functioning as a Go gage in pass/fail inspection workflows. The gage has a nominal diameter of 20.13 mm with a tolerance of 0.005 mm, and features a 10 microinch surface finish for consistent, repeatable contact. An overall length of 2.0000 inches makes it compatible with standard handle sets. A Certificate of Accuracy with NIST traceability is included, satisfying documentation requirements for calibrated measurement tools in quality-controlled environments.

This plug gage is intended for use in manufacturing, machining, and quality control settings where hole diameter must be verified to tight tolerances. Typical applications include Go inspection of drilled, reamed, or bored holes, as well as setting and verifying micrometers, verniers, and other measuring devices. It is suited for both shop-floor inspection and metrology lab use. The ASME B89.1 standard governs its manufacturing tolerances, making it appropriate for any operation requiring traceable, standards-compliant dimensional verification.

Key Features

• 20.13 mm nominal diameter with 0.005 mm tolerance for precise Go inspection
• 10 microinch surface finish promotes consistent, wear-resistant contact
• Tool steel construction provides hardness and dimensional stability
• Meets ASME B89.1 standards for plug gage manufacturing tolerances
• Includes Certificate of Accuracy with NIST traceability for quality documentation
• 2.0000-inch overall length fits standard plug gage handles

Compatibility

Designed for use with standard plug gage handle sets for Go inspection of internal bored features, and for setting micrometers, verniers, and other measuring devices requiring a traceable reference standard.

Installation Notes

Plug gages are handled and used by machinists, quality technicians, and metrologists. Always clean the gage and the bore being inspected before use to prevent debris from affecting readings or damaging the gage surface. Never force the gage into a hole; excessive insertion force can cause premature wear or inaccurate readings. Store the gage in its protective case when not in use to preserve the surface finish and dimensional integrity.