Vermont Gage 112104100 Class Zz Plus Plug Gage 4.1mm

Product Description

The VERMONT GAGE 112104100 is a Class ZZ Plus plug gage designed for precision go inspection of bored holes, reamed features, and other internal diameters requiring tight dimensional control. The gage measures 4.1 mm in diameter with a tolerance of 0.00508 mm, making it suitable for high-accuracy inspection tasks in production and quality-control environments. The body is machined from tool steel and finished to a 10 microfinish surface rating for consistent, repeatable contact. Overall length is 2.0 inches. Each unit ships with a Certificate of Accuracy traceable to NIST, supporting documentation requirements in ISO and AS9100 quality systems. This gage is handled and interpreted by machinists, QC inspectors, and metrology technicians.

The 112104100 is used in go inspection routines to verify that internal features meet minimum diameter requirements before parts advance through a production process. It is also used to calibrate and verify the accuracy of set micrometers, verniers, and other measuring devices. Typical applications include machine shops, toolrooms, and inspection departments working with close-tolerance components in metalworking, aerospace, automotive, and general manufacturing. The 4.1 mm diameter covers a range of small-bore features common in precision machined parts.

Key Features

• Class ZZ Plus tolerance grade with 0.00508 mm tolerance for precise go inspection
• 4.1 mm diameter in tool steel construction for wear resistance and dimensional stability
• 10 microfinish surface finish for consistent, low-friction contact during inspection
• NIST-traceable Certificate of Accuracy included with each unit
• Conforms to ASME B89.1 dimensional gage standards
• Suitable for use as a setting standard for micrometers, verniers, and other measuring devices

Compatibility

Designed for go inspection of internal features at 4.1 mm nominal diameter. Also compatible for use as a setting reference with set micrometers, verniers, and comparable measuring instruments per ASME B89.1 guidelines.

Installation Notes

Plug gages are handled by trained machinists and metrology technicians. Clean the gage and the workpiece bore thoroughly before use to prevent false readings caused by debris or coolant residue. Apply only light hand pressure when inserting the gage into a bore — never force a plug gage, as this can damage the gage land or the workpiece feature. Store the gage in its protective case when not in use to prevent corrosion and surface damage to the tool steel.