Spi 19-709-5 Class Zz Minus Plug Pin Gage 0.709 in

Product Description

The SPI 19-709-5 is a Class ZZ minus plug pin gage machined to a nominal diameter of 0.709 inches with a minus tolerance of 0.0002 inches. Plug pin gages are single-ended or double-ended cylindrical gauging tools used to verify bore diameters and hole sizes to a specified tolerance class. Class ZZ represents the most common commercial tolerance grade, suitable for general inspection work where ultra-precision master-grade gages are not required. This gage is constructed from steel and is used by machinists, quality control inspectors, and toolroom technicians to confirm that drilled, reamed, or bored holes fall within acceptable dimensional limits.

This gage is suited for production floor inspection and incoming quality checks in machine shops, manufacturing facilities, and toolrooms. It is used to verify hole diameters in metal, plastic, and composite workpieces where a 0.709-inch nominal bore must be confirmed to tolerance. Class ZZ minus gages are a standard choice for go/no-go gauging setups and general dimensional verification tasks where certified gage blocks or master-grade tooling are not specified by the inspection plan.

Key Features

• 0.709-inch nominal diameter for direct bore verification at that size
• Class ZZ tolerance grade for general commercial inspection use
• Minus tolerance specification of 0.0002 inches
• Steel construction for wear resistance and dimensional stability
• Single-unit packaging suitable for individual replacement or kit supplementing

Compatibility

Designed as a standard Class ZZ minus plug pin gage for use with compatible gage handle holders sized for 0.709-inch diameter gage pins.

Installation Notes

Plug pin gages are handled and used by quality control technicians and machinists and do not require installation in the conventional sense. Keep the gage clean and lightly oiled when not in use to prevent corrosion and maintain dimensional accuracy. Do not force a plug gage into an undersized bore, as this can damage both the gage and the workpiece. Store in a protective case away from temperature extremes to prevent thermal expansion errors during measurement.