Spi 19-589-1 Class Zz Minus Plug Pin Gage 0.589 in

Product Description

The SPI 19-589-1 is a Class ZZ minus plug pin gage used to verify bore and hole diameters in precision machining and quality control applications. It measures 0.589 inches in diameter with a minus tolerance of 0.0002 inches, meaning the gage is manufactured slightly under the nominal dimension. Constructed from steel, it delivers the hardness and wear resistance required for repeated use in shop-floor inspection. Machinists, toolmakers, and quality technicians use Class ZZ gages as a cost-effective go/no-go check or as a reference tool in low-to-medium tolerance inspection workflows.

This plug pin gage is suited for checking drilled, reamed, or bored holes in manufacturing, fabrication, and inspection environments. It is appropriate for both production floor use and receiving inspection where verifying a 0.589-inch nominal diameter is required. The Class ZZ designation places it in the working gage category, typically used where ultra-high precision Class Z or ZZ-plus tolerance is not required. It is a single-ended gage sized for manual handling and direct insertion into the feature being checked.

Key Features

• 0.589-inch nominal diameter for precise bore verification
• Class ZZ minus tolerance of 0.0002 inches for consistent go/no-go checking
• Steel construction for durability and wear resistance in production environments
• Compact and lightweight at 0.2 pounds for easy one-handed use
• Single-piece plug gage design for straightforward insertion and inspection

Compatibility

Designed as a working-class plug pin gage for manual inspection of 0.589-inch nominal diameter holes and bores across general machining and fabrication applications.

Installation Notes

Plug pin gages are handled and used by machinists, toolmakers, and quality inspectors — no power tools or utilities need to be shut down prior to use. Keep the gage clean and lightly oiled when stored to prevent corrosion and maintain calibration integrity. Do not force the gage into an undersized bore, as this can damage both the gage and the workpiece. Periodic recalibration against a traceable standard is recommended to confirm the gage remains within tolerance.