Vermont Gage 911115900 Class Zz Plus Plug Gage 0.159 in

Product Description

The VERMONT GAGE 911115900 is a Class ZZ Plus plug gage designed for precision inspection of hole diameters in manufacturing and quality-control environments. Built from tool steel with a black oxide finish, this go-style gage checks a 0.159-inch nominal diameter with a tolerance of 0.0002 inches. At 2.0 inches in overall length, it is compact and suited for bench or in-line inspection work. Each unit ships with a Certificate of Accuracy traceable to NIST, confirming dimensional compliance at the time of manufacture. Machinists, toolroom technicians, and quality inspectors rely on this type of plug gage for fast, repeatable attribute inspection.

This plug gage is intended for go inspection of bored, drilled, or reamed holes held to tight diameter tolerances. It is also used for setting and verifying micrometers, verniers, and other measuring devices requiring a known reference diameter. Typical applications include production floor inspection, first-article verification, and incoming material inspection across metalworking, aerospace, and general manufacturing operations. The ASME B89.1 standard governs its dimensional accuracy requirements.

Key Features

• Class ZZ Plus tolerance grade for reliable go inspection at 0.159-inch diameter
• Tolerance of 0.0002 inches meets ASME B89.1 dimensional accuracy requirements
• Tool steel construction provides wear resistance for repeated inspection cycles
• Black oxide finish reduces surface corrosion and light glare during use
• Includes Certificate of Accuracy with NIST traceability for quality documentation
• Compact 2.0-inch overall length fits standard plug gage handles and fixtures

Compatibility

Designed as an OEM-style Class ZZ Plus plug gage member for use with standard plug gage handles accepting a 0.159-inch diameter gage pin. Suitable for use as a reference standard with micrometers, verniers, and comparable measuring instruments requiring a certified diameter reference.

Installation Notes

Plug gages are handled and used by machinists and quality technicians — no mechanical installation is required. Keep the gage clean and lightly oiled when stored to prevent surface corrosion. Do not force the gage into a hole; apply steady, light axial pressure only. Store separately from abrasive tools to protect the finished diameter surface.