Vermont Gage 111137900 Class Zz Plus Plug Gage 0.379 in

Product Description

The VERMONT GAGE 111137900 is a Class ZZ Plus plug gage designed for precision go inspection of machined bores and holes at 0.379 inches diameter. Manufactured from tool steel with a 10 microfinish surface, this gage delivers a tolerance of 0.0002 inches, meeting the accuracy requirements of ASME B89.1. It ships with a Certificate of Accuracy with NIST traceability, making it suitable for quality-controlled production environments. Machinists, toolroom technicians, and quality control inspectors use this type of gage to verify that an internal diameter meets its minimum acceptable size before a part advances to the next stage.

This plug gage is used in manufacturing, toolroom, and inspection environments where go-type attribute gauging is required on holes nominally sized at 0.379 inches. It is also applicable for setting and verifying calibration of micrometers, verniers, and other comparative measuring devices. The overall length of 2.0 inches is appropriate for standard bench and hand-held inspection use on typical workpiece depths encountered in general machining and fabrication operations.

Key Features

• Class ZZ Plus tolerance of 0.0002 inches for reliable go-inspection gauging
• 10 microfinish surface for consistent, low-wear contact with inspected bores
• Tool steel construction provides durability under repeated production use
• Conforms to ASME B89.1 dimensional standards
• Includes Certificate of Accuracy with NIST traceability for audit and calibration records
• Suitable for setting micrometers, verniers, and other measuring devices

Compatibility

Designed for go inspection of internal diameters nominally 0.379 inches, and for use as a reference standard when setting micrometers, verniers, and other precision measuring devices.

Installation Notes

Handle plug gages with clean, dry hands or lint-free gloves to prevent corrosion from skin oils. Before use, verify the gage and workpiece are at the same ambient temperature to avoid thermal expansion errors. Do not force the gage into an undersized bore; apply only light hand pressure consistent with go-gage practice. Store in the provided case or a clean, dry location to preserve the lapped surface finish and maintain calibration integrity.