Spi 19-561-0 Class Zz Minus Plug Pin Gage 0.561 in

Product Description

The SPI 19-561-0 is a Class ZZ minus plug pin gage with a 0.561-inch nominal diameter, manufactured from steel. Plug pin gages are precision go/no-go inspection tools used to verify bore diameter, hole size, and feature location in machined or fabricated components. The Class ZZ tolerance classification designates a minus condition, meaning the gage is manufactured to a tolerance of 0.0002 inches below nominal. This gage is designed for shop-floor and inspection-room use by machinists, quality control technicians, and tool-and-die professionals who require reliable dimensional verification without investing in higher-grade gage blocks or CMM equipment.

Class ZZ plug gages are typically applied in general-purpose inspection of production parts where hole diameter conformance must be confirmed quickly and repeatably. This gage is suited for use in light manufacturing, job shops, and maintenance environments where tolerance control on bored, drilled, or reamed holes is required. The steel construction provides durability for repeated use across standard production inspection cycles.

Key Features

• 0.561-inch nominal diameter for precise bore and hole verification
• Class ZZ classification with minus designation and 0.0002-inch tolerance
• Steel construction for durability and dimensional stability
• Compact form factor suitable for shop-floor inspection use
• Single-piece package quantity for individual replacement or addition to gage sets

Compatibility

Designed as a general-purpose Class ZZ minus plug pin gage for inspecting holes and bores with a nominal diameter of 0.561 inches in standard production and shop-floor inspection applications.

Installation Notes

Plug pin gages are handled and used by machinists and quality control inspectors and do not require installation in a mechanical system. Gages should be cleaned and lightly oiled before and after use to prevent corrosion and maintain accuracy. Do not force the gage into a hole; insertion should be smooth and require minimal hand pressure. Store the gage in its protective case or on a clean, dry surface away from other tooling to prevent surface damage that could affect dimensional accuracy.