Vermont Gage 111115800 Class Zz Plus Plug Gage 0.158 in

Product Description

The VERMONT GAGE 111115800 is a Class ZZ Plus plug gage designed for precise go inspection of bored, drilled, and reamed holes. Machined from tool steel and finished to a 10 microfinish surface, this gage checks that a 0.158-inch diameter hole meets its lower tolerance boundary before the part advances to the next stage of production. It holds a tolerance of 0.0002 inches, placing it within Class ZZ Plus accuracy standards as defined by ASME B89.1. Each unit ships with a Certificate of Accuracy with NIST Traceability, supporting quality audits and ISO-compliant inspection records. Machinists, quality technicians, and tool-and-die trades rely on this type of gage for fast, repeatable attribute inspection at the machine or inspection bench.

This plug gage is suited for production floor inspection, incoming quality control, and calibration verification tasks. It is used alongside set micrometers, verniers, and other measuring devices to confirm hole size conformance in metal, plastic, and composite workpieces. The 0.158-inch nominal diameter makes it appropriate for small-bore inspection in precision machined components across manufacturing, aerospace, automotive, and general metalworking environments. Overall length is 2.0 inches, making it compact enough for use in tight setups and fixture-mounted inspection stations.

Key Features

• Class ZZ Plus accuracy to ASME B89.1 standard
• 0.158-inch measurement diameter with 0.0002-inch tolerance
• 10 microfinish surface for consistent, low-wear contact
• Tool steel construction for durability in production environments
• Includes Certificate of Accuracy with NIST Traceability
• Compact 2.0-inch overall length suits tight inspection setups

Compatibility

Designed for go inspection use with set micrometers, verniers, and other measuring devices where a 0.158-inch nominal hole diameter is being verified to Class ZZ Plus tolerances per ASME B89.1.

Installation Notes

Plug gages are handled and used by quality technicians and machinists. Clean the gage and the workpiece bore before use to prevent false readings caused by chips or debris. Store the gage in its protective case when not in use to preserve the surface finish and prevent corrosion. Never force a plug gage into a hole; if resistance is felt during a go check, the bore is undersize and should be returned for rework.