Vermont Gage 911120100 Class Zz Plus Plug Gage 0.201 in

Product Description

The VERMONT GAGE 911120100 is a Class ZZ Plus plug gage used to verify hole and bore dimensions during go inspection procedures. Manufactured from tool steel with a black oxide finish, this plug gage measures a nominal diameter of 0.201 inches with a tolerance of 0.0002 inches. The overall length is 2.0 inches, making it well-suited for benchtop and in-process inspection work. Each unit ships with a Certificate of Accuracy traceable to NIST, meeting ASME B89.1 standards. Machinists, quality control technicians, and precision metrology professionals use this type of gage to confirm that drilled, reamed, or bored features meet specified dimensional tolerances before parts advance through production.

This plug gage is designed for go inspection applications and is compatible with standard gage-block setups, set micrometers, verniers, and other calibrated measuring devices. It is commonly used in machine shops, manufacturing facilities, and quality labs where tight dimensional control is required. The 0.201-inch diameter targets precision-bored holes in metal components where ASME B89.1 compliance is a requirement. The black oxide coating provides corrosion resistance suitable for shop-floor handling. Installation of this gage into a gage handle is straightforward and requires no special tooling beyond a properly sized gage handle or holder.

Key Features

• 0.201-inch measurement diameter with 0.0002-inch tolerance per Class ZZ Plus specification
• Tool steel construction for durability and dimensional stability under repeated use
• Black oxide finish provides corrosion resistance for shop-floor environments
• Includes Certificate of Accuracy with NIST traceability
• Conforms to ASME B89.1 dimensional gage standards
• Overall length of 2.0 inches for use in standard gage handles

Compatibility

Designed for use with set micrometers, verniers, and other calibrated measuring devices as stated by the manufacturer. Intended for go inspection applications on bored or drilled features requiring 0.201-inch nominal diameter verification.

Installation Notes

This plug gage is installed into a compatible gage handle or holder by a machinist or quality technician. Ensure the gage and workpiece are at the same temperature before measurement to avoid thermal expansion errors. Clean the gage and the hole being inspected before use to prevent debris from affecting readings. Handle with care to avoid nicking or scratching the gage surface, as damage will affect accuracy and may require recalibration.