Spi 19-574-3 Class Zz Minus Plug Pin Gage 0.574 in

Product Description

The SPI 19-574-3 is a Class ZZ minus plug pin gage machined from steel, designed to verify bore and hole diameters to a nominal size of 0.574 inches. It carries a minus tolerance of 0.0002 inches, conforming to Class ZZ go/no-go gage standards used for general-purpose dimensional inspection. Licensed machinists, tool-and-die makers, QC technicians, and maintenance professionals use plug pin gages like this one to confirm that a drilled or reamed hole falls within acceptable dimensional limits before assembly or further machining operations proceed.

The 19-574-3 is suited for shop-floor and inspection-room use where a 0.574-inch nominal bore must be verified against a dimensional tolerance. Typical applications include incoming inspection of machined components, in-process quality checks on CNC or manual machining operations, and verification of hole sizes in metal fabrication, maintenance repair, and tooling work. The steel construction handles repeated insertion into ferrous and non-ferrous workpieces without rapid wear under normal inspection loads.

Key Features

• 0.574-inch nominal diameter for direct go/no-go bore inspection
• Class ZZ minus tolerance of 0.0002 inches for general-purpose dimensional verification
• Steel construction provides durability through repeated use
• Compact, single-piece pin design for straightforward hand use without additional tooling
• Individual unit packaging keeps the gage protected and ready for calibration tracking

Compatibility

Designed as a general-purpose Class ZZ minus plug pin gage for verifying 0.574-inch nominal diameter bores in standard shop and inspection applications.

Installation Notes

Plug pin gages are handled and used by QC technicians and machinists following standard dimensional inspection procedures. Before use, ensure the workpiece bore and the gage pin are clean and free of chips, coolant, and debris, as contamination directly affects measurement accuracy. Do not force the pin into a bore; excessive insertion force can damage the gage surface and alter its calibration. Gages should be periodically re-calibrated or checked against a master reference standard in accordance with your shop quality system requirements.