Vermont Gage 112315990 Class Zz Plus Plug Gage 15.99mm

Product Description

The VERMONT GAGE 112315990 is a Class ZZ Plus plug gage designed for go inspection of bored, reamed, and machined holes with a nominal diameter of 15.99 mm. Manufactured from tool steel with a 10 micro finish, this gage delivers a tolerance of 0.005 mm (0.00508 mm), making it suitable for precise dimensional verification in production and quality-control environments. The overall length measures 2.0000 inches. Each unit ships with a Certificate of Accuracy traceable to NIST, meeting ASME B89.1 standards. Machinists, toolroom technicians, and quality inspectors use this gage to verify that a workpiece feature accepts the go member, confirming the feature is at or above minimum allowable size.

This plug gage is used in manufacturing facilities, machine shops, and inspection labs where hole diameter conformance must be verified against a known standard. It is also suitable for setting and verifying micrometers, verniers, and other measuring devices requiring a reference of known diameter. The Class ZZ Plus tolerance class makes it appropriate for inspection-grade work where tighter gage tolerance is required compared to standard Class ZZ tooling gages.

Key Features

• 15.99 mm nominal diameter for go inspection of machined holes
• Class ZZ Plus tolerance class — 0.005 mm tolerance per ASME B89.1
• Tool steel construction with 10 micro surface finish
• Overall length of 2.0000 inches for standard handle compatibility
• Includes Certificate of Accuracy with NIST traceability
• Suitable for setting micrometers, verniers, and other measuring devices

Compatibility

Designed for go inspection applications requiring a 15.99 mm diameter reference. Also used to set or verify micrometers, verniers, and other measuring devices requiring a certified dimensional reference.

Installation Notes

Plug gages are handled and used by machinists, toolroom personnel, and quality technicians — no installation in the traditional sense is required. Store the gage in its protective case when not in use to prevent surface damage and corrosion. Clean the gage and the workpiece bore before use; debris or chips can cause false readings and accelerate wear on the gage surface. Do not force the go member into a bore — if resistance is felt beyond normal fit, re-examine the workpiece before proceeding.