Spi 19-957-0 Class Zz Minus Plug Pin Gage 0.957 in

Product Description

The SPI 19-957-0 is a Class ZZ minus plug pin gage machined from steel and used to verify bore diameters in precision manufacturing and inspection workflows. It measures a nominal diameter of 0.957 inches with a minus tolerance of 0.000200 inches, making it suitable for go/no-go gauging applications where tight dimensional control is required. Machinists, tool-and-die makers, and quality control technicians use pin gages like this one to confirm that drilled, reamed, or bored holes fall within specified tolerances. The Class ZZ designation indicates a commercial-grade tolerance class appropriate for general inspection use rather than master or reference standards.

This plug pin gage is used in production and inspection environments across metalworking, fabrication, and precision machining shops. It is well suited for checking hole sizes on workpieces prior to assembly or final inspection. The 0.957-inch diameter targets mid-range bore sizes commonly encountered in mechanical component manufacturing. A single gage is supplied per package, and no additional tooling or fixtures are required for basic go/no-go inspection tasks.

Key Features

• Nominal measurement diameter of 0.957 inches for consistent bore verification
• Minus tolerance of 0.000200 inches per Class ZZ specification
• Steel construction for durability and wear resistance in production environments
• Class ZZ rating suitable for commercial-grade go/no-go inspection applications
• Single-piece package with no minimum order beyond one unit

Compatibility

Designed as a standard Class ZZ minus plug pin gage for use in general-purpose bore inspection applications requiring a 0.957-inch nominal diameter check.

Installation Notes

Pin gages are handled and used by machinists and quality control technicians. Clean the gage and the bore to be measured before use to prevent debris from affecting the reading. Store pin gages in a protective case away from other metal tools to prevent surface damage that could affect tolerance accuracy. Do not force the gage into an undersized bore, as this can damage the gage surface and compromise its calibration integrity.