Spi 19-744-2 Class Zz Minus Plug Pin Gage 0.744 in

Product Description

The SPI 19-744-2 is a Class ZZ minus plug pin gage machined from steel and used to verify bore diameters in production and inspection environments. It measures a nominal diameter of 0.744 inches with a minus tolerance of 0.0002 inches, making it suitable for go/no-go gauging applications where dimensional accuracy is critical. This gage is a standard hand tool used by machinists, quality control technicians, and tool-and-die professionals to confirm that drilled, reamed, or bored holes meet specified tolerances before parts move to the next stage of production.

Class ZZ plug gages are designed for general-purpose inspection work in production shops and quality labs. The minus designation means the gage is manufactured to the low side of the nominal diameter, which is the standard approach for go-style plug gages used to verify minimum acceptable bore size. This gage is appropriate for use on metal, plastic, or composite workpieces where a 0.744-inch bore must be confirmed within close tolerances. It is a single-ended gage suited for bench inspection or in-line quality checks on the shop floor.

Key Features

• Nominal diameter of 0.744 inches for precise bore verification
• Class ZZ tolerance class for general-purpose production inspection
• Minus tolerance of 0.0002 inches for go-side gauging accuracy
• Steel construction for durability and dimensional stability
• Single-piece design suited for bench or in-line inspection use

Compatibility

Designed as a general-purpose plug pin gage for verifying 0.744-inch nominal bore diameters in standard production inspection and quality control applications.

Installation Notes

Plug pin gages are handled and used by machinists and quality control technicians — no installation in the traditional sense is required. Clean the gage and the bore being checked before use to prevent debris from affecting the reading. Do not force the gage into a bore; resistance without full entry indicates the bore is undersized. Store the gage in a protective case away from other tools to prevent surface damage that could affect dimensional accuracy.