Vermont Gage 901200400 Class Zz Plug Gage Set 190 Pc

Product Description

The VERMONT GAGE 901200400 is a Class ZZ plug gage set designed for precision hole measurement and dimensional inspection work. The set covers a diameter range of 0.061 to 0.25 inches across 190 individual gages, each manufactured from steel with a black oxide finish. Tolerance is held to a minus 0.000200 inches, consistent with Class ZZ standards. These gages are used by machinists, quality control technicians, and tool and die professionals who require traceable, reliable go/no-go inspection capability. Every set ships with a Certificate of Accuracy that is NIST traceable.

This set is suited for shop-floor and inspection-room applications where hole diameter verification, slot width measurement, and inter-hole distance calculation are routine tasks. The 190-piece range allows coverage of a broad diameter spectrum without switching to a separate set. Typical use cases include setting micrometers and verniers, no-go gaging inspection, and verifying machined bores to print tolerances. The black oxide finish reduces surface glare and provides a degree of corrosion resistance during handling.

Key Features

• 190-piece set covering 0.061 to 0.25 inches diameter range
• Class ZZ tolerance of minus 0.000200 inches per gage
• Steel construction with black oxide finish
• NIST traceable Certificate of Accuracy included
• Suitable for no-go gaging inspection, setting measuring devices, and hole diameter measurement
• Supports applications including slot width location, inter-hole distance calculation, and micrometer calibration setup

Compatibility

Designed as a standard Class ZZ plug gage set for use with common gage handle systems and holders compatible with wire-gage-range plug members in the 0.061 to 0.25 inch diameter class.

Installation Notes

Plug gages should be handled by qualified inspection or machining personnel familiar with precision measurement practices. Clean gage members and workpiece bores before use to prevent contamination from affecting readings. Store gages in their designated case when not in use to protect the lapped surfaces from damage. Do not force a gage member into a bore; forcing can damage both the gage and the workpiece and will compromise measurement accuracy.