Vermont Gage 112301790 Class Zz Plus Plug Gage 1.79 Mm

Product Description

The VERMONT GAGE 112301790 is a Class ZZ Plus plug gage designed for precision dimensional inspection of small bores and holes. Manufactured from tool steel with a 10 microfinish surface coating, this gage checks whether a feature falls within acceptable tolerance limits during go inspection procedures. The nominal diameter is 1.79 mm with a tolerance of 0.005 mm, making it suitable for high-accuracy quality control work. Each unit ships with a Certificate of Accuracy traceable to NIST, confirming calibration to ASME B89.1 standards. Machinists, quality technicians, and metrologists rely on plug gages like this one for fast, repeatable attribute inspection on the shop floor or in the metrology lab.

This plug gage is intended for go inspection applications where a part feature must pass a minimum size threshold. It is also used to set and verify micrometers, verniers, and other measuring devices. Typical installation environments include precision machine shops, manufacturing quality departments, tool rooms, and calibration labs working with small-diameter bores in metal, plastic, or composite workpieces. The 2.0 inch overall length provides adequate handling clearance for most bench inspection setups.

Key Features

• Class ZZ Plus tolerance classification for go inspection per ASME B89.1
• 1.79 mm nominal diameter with 0.005 mm tolerance
• Tool steel construction for wear resistance and dimensional stability
• 10 microfinish surface coating for smooth, consistent gage contact
• Includes Certificate of Accuracy with NIST traceability
• 2.0 inch overall length for convenient bench handling

Compatibility

Designed for go inspection of 1.79 mm diameter bores and as a setting standard for micrometers, verniers, and other precision measuring devices. Suitable for use wherever ASME B89.1 dimensional inspection standards apply.

Installation Notes

Plug gages are handled and used by quality technicians and metrologists — no power tools or electrical shutoff procedures are required. Store the gage in its protective case and apply a light coat of instrument oil when not in use to prevent corrosion. Clean the gage and the workpiece bore before inspection to avoid debris-induced false readings. Follow your facility calibration schedule and re-verify the gage against its certificate of accuracy at regular intervals to maintain traceability.