Spi 19-106-4 Class Zz Minus Plug Pin Gage 0.106 in

Product Description

The SPI 19-106-4 is a Class ZZ minus plug pin gage with a 0.106-inch nominal diameter, manufactured from steel. It is used to verify hole sizes and bore diameters by checking whether a machined feature meets a specified minimum dimension. The minus tolerance designation means the gage is ground to the low side of the nominal, providing a go-gage function appropriate for tolerance verification in production and inspection environments. With a tolerance of 0.0002 inches, it delivers precise, repeatable measurement for quality control applications. Machinists, toolmakers, and inspection technicians are the primary users of this type of precision gage.

This pin gage is suited for incoming inspection, in-process gauging, and final quality checks in machine shops, manufacturing facilities, and tool rooms. It is used to check drilled, reamed, or bored holes where tight dimensional control is required. The 0.106-inch diameter fits a range of small-bore applications common in precision component manufacturing. Class ZZ gages are generally used for commercial-grade inspection work rather than laboratory or master-gage applications.

Key Features

• Class ZZ tolerance class — suitable for commercial production inspection
• Minus designation — ground to the low side of nominal for go-gage use
• 0.0002-inch tolerance for consistent, repeatable measurement results
• Steel construction for durability in shop-floor inspection environments
• 0.106-inch nominal diameter for small-bore hole verification

Compatibility

Designed as a standard Class ZZ minus plug pin gage for use with pin gage handles and sets in precision inspection applications requiring a 0.106-inch nominal diameter check.

Installation Notes

Pin gages are used by hand; no power source or special tools are required for operation. Handle the gage carefully to avoid dropping or nicking the precision-ground surface, as damage will affect accuracy. Clean the gage and the hole being checked before use to prevent debris from affecting the measurement. Store in a protective case away from moisture to prevent corrosion of the steel surface.