Spi 19-047-0 Class Zz Minus Plug Pin Gage 0.047 in

Product Description

The SPI 19-047-0 is a Class ZZ minus plug pin gage machined from steel and used to verify hole diameters through go/no-go inspection routines. This gage measures a nominal diameter of 0.047 inches with a tolerance of 0.0002 inches, placing it in the Class ZZ accuracy range suited for general-purpose production inspection. Machinists, toolmakers, and quality control technicians rely on pin gages like this one to confirm bore size conformance during manufacturing and incoming inspection. The minus designation indicates the gage is ground to the lower end of the tolerance band, which is standard practice for plug gages used in go-type applications.

This pin gage is used in machine shops, fabrication facilities, and quality labs where small-bore dimensional verification is required. At 0.047 inches nominal diameter, it falls in the wire-gage size range and is commonly applied when inspecting drilled or reamed holes in precision components. It is appropriate for use on metals, plastics, and composites wherever tight hole-size control is specified on engineering drawings.

Key Features

• Nominal diameter of 0.047 inches for small-bore inspection
• Class ZZ tolerance of 0.0002 inches for general-purpose dimensional verification
• Minus designation grounds the gage to the lower tolerance boundary, standard for go-plug applications
• Steel construction for durability and dimensional stability during repeated use
• Individual unit packaging suitable for single-gage replacement or kit building

Compatibility

Designed as a general-purpose Class ZZ minus plug pin gage suitable for use with standard pin gage handles and sets sized for the wire-gage diameter range.

Installation Notes

Pin gages should be inserted and withdrawn by a licensed or trained metrology or machining professional using clean, lubricated technique to avoid galling or scoring the bore being inspected. Always clean and lightly oil the gage before and after use to prevent corrosion and contamination of reference surfaces. Store in a protective case away from other metal tooling to prevent contact damage that can alter the ground diameter.