Vermont Gage 101200500 Class Zz Plug Gage Set 250 Pc

Product Description

The VERMONT GAGE 101200500 is a Class ZZ plug gage set covering a diameter range of 0.251 to 0.500 inches across 250 individual gages. Each gage is manufactured from steel and held to a minus tolerance of 0.0002 inches, meeting NIST traceable standards. The set is used to verify hole diameters, check slot widths, calculate distances between holes, and set micrometers, verniers, and other measuring devices. A Certificate of Accuracy with NIST traceability is included with every set. Machinists, quality control technicians, and metrology professionals are the primary users of this tooling.

This plug gage set is suited for dimensional inspection work in machine shops, tool rooms, and quality assurance environments. Applications include GO and NO-GO gaging inspection, measuring hole diameters to close tolerances, verifying gage slot widths and locations, and calibrating hand measuring instruments. The 250-piece count provides complete coverage across the full 0.251 to 0.500 inch range, making it appropriate for both production inspection and tool room use in light manufacturing, aerospace, automotive, and general metalworking settings.

Key Features

• Class ZZ tolerance classification with 0.0002 inch minus tolerance for reliable go and no-go inspection
• Covers 0.251 to 0.500 inch diameter range in a single 250-piece set
• Steel construction for durability in shop and inspection environments
• NIST traceable Certificate of Accuracy included with the set
• Suitable for setting micrometers, verniers, and other precision measuring instruments
• Supports multiple applications including hole diameter measurement, slot gaging, and distance-between-holes calculations

Compatibility

Designed for use as a Class ZZ plug gage set in standard dimensional inspection applications requiring coverage of the 0.251 to 0.500 inch diameter range.

Installation Notes

Plug gages are handled and used by machinists and metrology technicians following standard inspection procedures. Store gages in the provided case when not in use to prevent damage to lapped surfaces. Clean gages before and after use with a lint-free cloth and appropriate instrument oil to prevent corrosion. Do not force a gage into a hole; apply only light hand pressure during inspection to avoid false readings or surface damage.