Vermont Gage 112319910 Class Zz Plus Plug Gage 19.91mm

Product Description

The VERMONT GAGE 112319910 is a Class ZZ Plus plug gage designed for precision dimensional inspection of bored holes and machined features. Built from tool steel with a 10 micro finish coating, this gage checks whether a hole falls within acceptable tolerance limits during Go inspection. The nominal diameter is 19.91 mm with a tolerance of 0.005 mm (0.00508 mm), meeting ASME B89.1 standards. Each unit ships with a Certificate of Accuracy traceable to NIST, making it suitable for use in calibrated inspection environments. The overall length is 2.0000 inches. Machinists, quality control technicians, and metrology professionals use this type of gage in production and inspection workflows.

This plug gage is used wherever close-tolerance hole verification is required, including inspection of bored, reamed, or drilled features in metal components. It is appropriate for use alongside set micrometers, verniers, and other measuring devices as part of a coordinated Go inspection routine. Suitable for both job-shop and production-floor inspection, this gage supports quality assurance programs that require documented NIST-traceable measurement standards. The Class ZZ Plus designation indicates the applicable tolerance grade for this gage class under ASME B89.1.

Key Features

• Class ZZ Plus tolerance grade per ASME B89.1 for Go inspection applications
• 19.91 mm nominal diameter with 0.005 mm tolerance
• Tool steel construction with 10 micro surface finish coating
• Includes Certificate of Accuracy with NIST traceability
• Overall length of 2.0000 inches for standard handle compatibility
• Compatible with set micrometers, verniers, and other measuring devices

Compatibility

Designed for Go inspection use with set micrometers, verniers, and other measuring devices as stated in product application data.

Installation Notes

Plug gages should be handled with clean, dry hands or lint-free gloves to prevent corrosion from skin oils. Store the gage in its protective case when not in use and allow it to temperature-stabilize to the inspection environment before use, particularly in precision applications. Calibration intervals should follow the facility quality management plan and applicable metrology standards. Do not force the gage into a feature; apply light, even pressure consistent with standard Go gage technique.