Spi 19-922-4 Class Zz Minus Plug Pin Gage 0.922 in

Product Description

The SPI 19-922-4 is a Class ZZ minus plug pin gage machined from steel, designed to verify bore and hole diameters to a nominal size of 0.922 inches. Class ZZ gages are the standard for general shop-floor inspection work, providing a reliable go/no-go reference for production tolerance checks. This gage carries a minus tolerance of 0.0002 inches, meaning the actual pin diameter is held below the nominal dimension. Machinists, quality control technicians, and toolroom professionals use plug pin gages like this one to confirm that drilled, reamed, or bored features fall within specified limits before parts move to the next stage of production.

This gage is suited for use in machine shops, fabrication facilities, and manufacturing production environments where dimensional verification of round features is required. It is appropriate for both batch inspection and in-process checks on ferrous and non-ferrous workpieces. The 0.922-inch nominal diameter targets a common bore size found across a range of mechanical assemblies and tooling applications. At 0.2 pounds, the gage is lightweight and easy to handle during repeated measurements.

Key Features

• Nominal diameter of 0.922 inches for direct bore verification at that target size
• Class ZZ tolerance classification suited for general-purpose shop inspection
• Minus tolerance of 0.0002 inches ensures the pin does not exceed the nominal size
• Steel construction provides durability and resistance to wear during repeated use
• Lightweight at 0.2 pounds for comfortable single-hand operation

Compatibility

Designed as a general-purpose Class ZZ minus plug pin gage for use in standard shop inspection applications requiring verification of 0.922-inch diameter bores and holes.

Installation Notes

Plug pin gages are handled and stored by metrology or quality control personnel and do not require power tools or fasteners for use. Clean the gage and the bore being checked before measurement to prevent debris from affecting readings. Store the gage in its protective case or on a padded surface away from other tooling to avoid nicks or corrosion that would affect accuracy. Periodic calibration against a traceable master is recommended to confirm the gage remains within its stated tolerance class.