Spi 19-594-1 Class Zz Minus Plug Pin Gage 0.594 in

Product Description

The SPI 19-594-1 is a Class ZZ minus plug pin gage used to verify hole diameters and bore tolerances in machined parts and assemblies. This gage measures 0.594 inches in diameter and is manufactured from steel for durability in shop and inspection environments. The minus tolerance designation means the gage is ground to the lower boundary of the nominal diameter, making it suitable for go/no-go inspection work where dimensional accuracy is critical. Machinists, quality control inspectors, and tool-and-die technicians rely on Class ZZ gages for production inspection of drilled, reamed, or bored holes.

This plug gage is appropriate for use in precision manufacturing, metal fabrication shops, and quality inspection departments. It fits standard gage handle holders sized for the 0.594-inch diameter range. Typical applications include verifying hole size conformance on machined components in automotive, aerospace, and general metalworking production environments where dimensional tolerances must be confirmed before assembly.

Key Features

• Class ZZ minus tolerance designation for lower-boundary hole inspection
• 0.594-inch nominal diameter for accurate bore verification
• Steel construction for wear resistance in production environments
• Tolerance of 0.000200 inches for precise dimensional control
• Compatible with standard gage handle holders for the applicable diameter range

Compatibility

Designed as an OEM-style replacement or direct-use plug gage for standard gage handle holders sized for the 0.594-inch diameter range, suitable for Class ZZ go/no-go inspection applications in production and quality control settings.

Installation Notes

Plug pin gages are handled and used by machinists and quality control inspectors following standard metrology practices. Clean the gage and the hole being inspected before use to prevent measurement errors caused by debris or burrs. Store the gage in a protective case away from other tooling to avoid surface damage that could affect accuracy. Periodic calibration against certified gage blocks is recommended to maintain measurement traceability.