Spi 29-504-8 Class Zz Plus Plug Gage 0.504 in

Product Description

The SPI 29-504-8 is a Class ZZ Plus plug gage designed for go/no-go dimensional inspection of bored holes, drilled passages, and machined features. It checks whether an inside diameter conforms to a specified nominal size of 0.504 inches with a tolerance of 0.0002 inches. Built from steel, this gage delivers the dimensional stability and wear resistance required for reliable shop-floor measurement. Class ZZ is the standard tolerance class for plug gages used in general inspection work, making this tool suitable for quality control applications where consistent, repeatable measurements are essential. Machinists, toolmakers, and quality technicians are the primary users of this type of gage.

This plug gage is used in machine shops, manufacturing facilities, and production environments where inside diameter verification is required. It is well suited for inspecting holes in metal components, fixtures, and assemblies where the nominal diameter of 0.504 inches must be confirmed within tight tolerance. The gage is appropriate for both incoming inspection and in-process quality checks across general metalworking and precision manufacturing applications.

Key Features

• Class ZZ Plus tolerance class for general-purpose inside diameter inspection
• Nominal measurement diameter of 0.504 inches
• Tolerance of 0.0002 inches for precise conformance verification
• Steel construction for durability and dimensional stability
• Compact and lightweight at 0.2 pounds for easy handling

Compatibility

Designed as a standard Class ZZ Plus plug gage for general inside diameter inspection of machined holes nominally sized at 0.504 inches.

Installation Notes

Plug gages are handled and used by machinists, toolmakers, and quality control technicians. Clean the gage and the workpiece bore before use to prevent debris from affecting the measurement reading. Do not force the gage into a hole; excessive insertion force can damage both the gage and the workpiece, and can accelerate gage wear. Store the gage in a protective case away from other tooling to maintain accuracy.