Spi 19-902-6 Class Zz Minus Plug Pin Gage 0.902 in

Product Description

The SPI 19-902-6 is a Class ZZ minus plug pin gage used to verify bore and hole diameters with a nominal measurement diameter of 0.902 inches. Built from steel, this go/no-go style gage provides a tolerance of 0.0002 inches, making it suitable for inspection and quality-control work in machine shops, manufacturing facilities, and tool rooms. Machinists, quality technicians, and tool-and-die professionals use plug gages like this to confirm that drilled, reamed, or bored holes fall within specified dimensional limits. The minus designation indicates the gage is ground below nominal, which is standard for Class ZZ go-gage applications.

This pin gage is intended for general-purpose dimensional inspection of holes and bores measuring 0.902 inches in diameter. Class ZZ gages are widely used in production and inspection environments where moderate tolerance verification is required. The steel construction provides durability for repeated use in standard shop-floor conditions. The unit ships individually and is appropriate for both incoming inspection and in-process quality checks on machined components.

Key Features

• Nominal measurement diameter of 0.902 inches for precise bore verification
• Class ZZ minus tolerance of 0.0002 inches for general-purpose inspection use
• Steel construction for durability in production and inspection environments
• Minus designation ground below nominal, standard for go-gage applications
• Single-piece unit packaged individually for straightforward inventory management

Compatibility

Designed as a general-purpose Class ZZ minus plug pin gage for verifying 0.902-inch diameter holes and bores in standard machined components.

Installation Notes

Plug pin gages are handled and used by machinists and quality control technicians. Clean the gage and the bore being checked before use to prevent measurement errors caused by debris or oil buildup. Do not force the gage into an undersize hole, as this can damage the gage surface and compromise calibration. Store the gage in a protective case away from other metal tooling to prevent surface nicks that would affect measurement accuracy.