Vermont Gage 112302850 Class Zz Plus Plug Gage 2.85mm

Product Description

The VERMONT GAGE 112302850 is a Class ZZ Plus plug gage machined from tool steel for dimensional go inspection of bored holes and internal features at 2.85 mm diameter. It carries a tolerance of 0.00508 mm and a 10 microfinish surface finish, meeting the precision requirements of ASME B89.1. Each gage ships with a Certificate of Accuracy traceable to NIST, confirming it is ready for calibration records and quality audits. Machinists, toolroom technicians, and quality inspectors use this style of plug gage to verify that a drilled, reamed, or bored hole has been produced within the accepted go limit before the part advances in production.

This plug gage is suited for go inspection in manufacturing and toolroom environments where tight hole tolerances must be verified at small diameters. It is also used to set and verify micrometers, verniers, and other measuring devices requiring a traceable reference at the 2.85 mm size. Typical applications include aerospace, medical device, and precision machining operations where ASME B89.1 compliance is required for internal measurement validation.

Key Features

• Class ZZ Plus tolerance of 0.00508 mm for high-precision go inspection
• 10 microfinish surface finish minimizes wear on the gage and the part being inspected
• Tool steel construction for durability in production and toolroom use
• Meets ASME B89.1 dimensional gage standards
• Includes Certificate of Accuracy with NIST traceability for calibration documentation

Compatibility

Designed as a go inspection plug gage for use with micrometers, verniers, and other measuring devices requiring a traceable reference standard at 2.85 mm diameter per ASME B89.1.

Installation Notes

Plug gages are handled and used by quality technicians and toolroom machinists — no power tools or mechanical installation is required. Store the gage in its protective case when not in use to prevent surface damage to the 10 microfinish. Clean contact surfaces before use and allow the gage and workpiece to reach the same ambient temperature, typically 68 degrees F per ASME standards, to avoid thermal expansion errors. Never force the gage into a hole; go gages should enter under light hand pressure only.