Spi 19-754-1 Class Zz Minus Plug Pin Gage 0.754 in

Product Description

The SPI 19-754-1 is a Class ZZ minus plug pin gage with a nominal diameter of 0.754 inches, manufactured from steel for consistent dimensional accuracy in go/no-go inspection work. Class ZZ is the standard tolerance class for plug gages used in general inspection applications, and the minus designation means the gage is manufactured to the low side of the nominal diameter. With a tolerance of 0.0002 inches, this gage is suited for verifying hole sizes in production and quality control environments. Machinists, tool and die makers, and quality technicians use plug pin gages like this one for fast, reliable bore and hole verification without the need for measuring instruments.

This pin gage is used in machine shops, manufacturing facilities, and inspection departments where hole diameter verification is part of standard quality assurance workflow. It is appropriate for checking drilled, reamed, or bored holes in metal, plastic, and composite workpieces. The 0.754-inch diameter makes it a direct fit for inspection of holes at that nominal size. It is typically used as a standalone gage or as part of a complete pin gage set covering a range of diameters.

Key Features

• Class ZZ tolerance class for general-purpose hole inspection
• Minus designation — manufactured to the low side of nominal diameter
• 0.0002-inch tolerance for consistent, repeatable measurement results
• Steel construction for durability and wear resistance in production environments
• Nominal diameter of 0.754 inches for direct hole size verification

Compatibility

Designed as a general-purpose Class ZZ minus plug pin gage for use in standard go/no-go hole inspection applications at 0.754 inches nominal diameter.

Installation Notes

Plug pin gages are handled and stored by quality technicians and machinists following standard metrology practices. Clean the gage and the hole being inspected before use to prevent debris from affecting measurement accuracy. Store in a protective case away from temperature extremes to maintain dimensional stability. Do not force the gage into an undersized hole, as this can damage the gage surface and compromise calibration.