Vermont Gage 111289100 Class Zz Minus Plug Pin Gage 0.8910 in

Product Description

The VERMONT GAGE 111289100 is a Class ZZ Minus plug pin gage machined from steel and used to perform NoGo inspection on bored, drilled, or reamed holes. The gage measures a nominal diameter of 0.8910 inches with a tolerance of 0.0002 inches, confirming that a hole does not exceed its maximum allowable size. It has an overall length of 2 inches and ships with a Certificate of Accuracy that carries NIST traceability. Dimensional inspectors, machinists, and quality technicians use this type of gage in production and receiving inspection settings where hole size acceptance must be documented.

Class ZZ plug pin gages are the working-grade standard for general shop and inspection use. This gage is suited for checking hole diameters in machined metal components across light manufacturing, job shop, and maintenance environments. Beyond NoGo hole inspection, the 0.8910-inch diameter also makes it useful for setting and verifying micrometers, verniers, and other dimensional measuring devices where a certified reference of known size is needed. The steel construction handles routine production environments without special handling precautions beyond standard gage care practices.

Key Features

• Class ZZ Minus tolerance classification for NoGo hole inspection and measuring device calibration reference
• 0.8910-inch nominal diameter with 0.0002-inch tolerance for precise go/no-go dimensional verification
• 2-inch overall length provides comfortable handling and clearance in most workpiece setups
• Steel construction for durability in production shop environments
• 10 micro finish on the gage surface for consistent contact and accurate readings
• Includes Certificate of Accuracy with NIST traceability for documentation and audit compliance

Compatibility

Designed for NoGo inspection of machined holes and for setting micrometers, verniers, and other dimensional measuring devices requiring a certified steel reference standard at 0.8910 inches.

Installation Notes

Pin gages are handled and used by dimensional inspectors and machinists; no power tools or mechanical installation is required. Store the gage in its protective sleeve or case when not in use to prevent corrosion and surface damage. Clean contact surfaces before use to avoid false readings caused by chips or debris. Follow shop metrology procedures for periodic recertification to maintain traceable accuracy records.