Vermont Gage 112420170 Class Zz Minus Plug Pin Gage 20.17mm

Product Description

The VERMONT GAGE 112420170 is a Class ZZ minus plug pin gage machined to a 20.17 mm diameter with a tolerance of 0.00508 mm. It is designed for NoGo inspection applications, providing a reliable go/no-go reference when checking bores, holes, and internal features to confirm a dimension is within acceptable limits. The gage measures 2 inches in overall length and is constructed from steel with a 10 micro coating finish. Each unit ships with a Certificate of Accuracy backed by NIST traceability, making it suitable for quality-controlled environments. Machinists, quality technicians, and tool room personnel use these gages as part of routine dimensional verification workflows.

This plug pin gage is used in precision measurement and inspection settings including machine shops, production lines, and calibration labs. It is appropriate for NoGo bore inspection and as a reference standard when setting or verifying micrometers, verniers, and other measuring devices. The Class ZZ designation indicates a general-purpose tolerance grade suited for production inspection rather than master or working-grade applications. The included NIST-traceable Certificate of Accuracy supports documentation requirements for ISO, AS9100, and similar quality management systems.

Key Features

• Class ZZ minus tolerance grade for NoGo production inspection
• 20.17 mm diameter with a tight 0.00508 mm tolerance
• Steel construction with 10 micro coating finish for wear resistance
• Includes NIST-traceable Certificate of Accuracy for quality records
• Compatible for use when setting micrometers, verniers, and other measuring devices
• Compact 2-inch overall length for easy handling in tight inspection setups

Compatibility

Designed for NoGo bore inspection and for use as a reference when setting or verifying micrometers, verniers, and other measuring devices. Suitable for any application requiring a Class ZZ minus plug gage at the 20.17 mm diameter.

Installation Notes

Plug pin gages should be handled with clean, dry hands or inspection gloves to prevent corrosion and measurement error from skin oils. Store the gage in its protective case when not in use and keep it away from abrasive surfaces. No power source or special tools are required for use, but the gage should be re-certified periodically in accordance with your facility quality plan and applicable metrology standards. Do not force the gage into a bore; light hand pressure is sufficient for a proper NoGo check.