Spi 19-433-2 Class Zz Minus Plug Pin Gage 0.433 in

Product Description

The SPI 19-433-2 is a Class ZZ minus plug pin gage designed for checking hole diameters and bore sizes in precision inspection and quality control applications. The gage measures 0.433 inches in diameter with a minus tolerance of 0.0002 inches, allowing it to confirm that a bore is at or above the minimum acceptable limit. Constructed from steel, this pin gage delivers the dimensional stability required for repeatable go/no-go inspection work. Machinists, toolmakers, and quality technicians use Class ZZ gages as a cost-effective standard for production inspection where high-precision master-grade tolerances are not required.

This pin gage is suited for use in manufacturing, machine shops, and fabrication environments where bore diameter verification is part of the standard inspection process. It is appropriate for checking holes in metal, plastic, and composite workpieces during in-process or final inspection. The single-gage format makes it easy to integrate into existing gage sets or use as a standalone check for a specific nominal diameter.

Key Features

• Class ZZ minus tolerance spec: 0.0002 inches for production-grade inspection
• 0.433 inch nominal diameter for direct bore verification
• Steel construction for dimensional stability and wear resistance
• Compact single-pin format — integrates into existing pin gage sets
• Minus designation confirms minimum acceptable bore limit

Compatibility

Designed as an OEM-style replacement or supplemental addition to Class ZZ pin gage sets used for standard production bore inspection in machine shop and quality control environments.

Installation Notes

Pin gages should be handled with clean, dry hands or cotton inspection gloves to prevent corrosion from skin oils. Store the gage in its protective sleeve or case when not in use to avoid contact damage. Before use, verify the gage surface is free of burrs, debris, or rust that could affect measurement accuracy. Periodic calibration against a certified master ring gage is recommended to confirm ongoing dimensional integrity.