Vermont Gage 112403950 Class Zz Minus Plug Pin Gage 3.95mm

Product Description

The VERMONT GAGE 112403950 is a Class ZZ Minus plug pin gage machined from steel for precise NoGo inspection of bored holes, drilled passages, and other internal features. The gage measures a nominal diameter of 3.95 mm with a tolerance of 0.00508 mm, providing the close control needed for go/no-go attribute inspection in production and quality environments. A 10-microfinish surface coating reduces wear and protects measurement integrity over repeated use cycles. Each unit ships with a Certificate of Accuracy traceable to NIST standards, satisfying most documented quality system requirements.

This plug pin gage is suited for manufacturing facilities, machine shops, and metrology labs where internal bore verification is required. Class ZZ tolerancing makes it appropriate for general-purpose inspection rather than master or reference-grade work. Typical applications include verifying hole sizes on machined components, setting micrometers, and calibrating verniers and other measuring devices where a reliable reference of known diameter is needed.

Key Features

• Class ZZ Minus tolerance classification for NoGo attribute inspection
• 3.95 mm nominal diameter with 0.00508 mm tolerance
• Steel construction with 10-microfinish surface coating for durability and wear resistance
• Certificate of Accuracy included with NIST traceability for quality system documentation
• Compact overall length of 2 inches for easy handling and gauge block setup

Compatibility

Designed for use in NoGo bore inspection applications and as a reference standard when setting micrometers, verniers, and other measuring devices requiring a 3.95 mm diameter reference.

Installation Notes

Pin gages are handled and used by quality technicians and metrologists in controlled inspection environments. Clean the gage pin and the bore or measuring instrument contact surfaces before each use to prevent debris from affecting readings. Store the pin in its protective case when not in use to preserve the surface finish and dimensional integrity. Do not force the pin into a bore that does not accept it freely, as this can damage both the gage and the part.