Spi 19-892-9 Class Zz Minus Plug Pin Gage 0.892 in

Product Description

The SPI 19-892-9 is a Class ZZ minus plug pin gage machined from steel and used to verify hole diameters to a nominal size of 0.892 inches. It holds a tolerance of 0.0002 inches, which places it within the Class ZZ specification for general-purpose inspection work. Minus-type gages are sized below nominal, making them suitable for go/no-go gauging applications where the gage must pass through a conforming hole without forcing. Machinists, quality control technicians, and tool room personnel use pin gages like this one to confirm bore dimensions on machined parts, castings, and assemblies.

This gage is suited for dimensional inspection in production and job shop environments. It is used wherever a 0.892-inch nominal bore must be checked for conformance to print tolerances. Common applications include incoming inspection of purchased components, in-process checks on machined bores, and final inspection of finished assemblies. The steel construction provides durability for repeated use in shop floor conditions.

Key Features

• Class ZZ tolerance classification for general-purpose dimensional inspection
• Minus designation — gage is ground below nominal for go/no-go hole checking
• 0.0002-inch tolerance for reliable, repeatable bore verification
• Steel construction for durability in production and tool room environments
• 0.892-inch nominal diameter targets common bore sizes in machined components

Compatibility

Designed as a standard Class ZZ minus plug pin gage for general-purpose hole inspection at a nominal diameter of 0.892 inches.

Installation Notes

Pin gages are handled and used by machinists and quality technicians, not installed in the field. Store the gage in its protective sleeve or case when not in use to prevent damage to the ground surface. Clean the gage and bore before gauging to avoid false readings from chips or debris. Do not force the gage through an undersized hole, as this will damage the precision-ground surface and invalidate the tool.