Spi 19-566-9 Class Zz Minus Plug Pin Gage 0.566 in

Product Description

The SPI 19-566-9 is a Class ZZ minus plug pin gage ground to a nominal diameter of 0.566 inches with a minus tolerance of 0.0002 inches. Pin gages in this class are used to verify hole diameters, bore sizes, and slot widths to a known dimensional standard. The Class ZZ designation indicates a general-purpose inspection grade suitable for shop-floor and incoming inspection use. The steel construction provides durability under repeated use. Machinists, quality technicians, and tool-and-die professionals use this gage to confirm that a drilled, reamed, or bored feature meets print tolerance before the part moves to the next operation.

This gage is applicable in metalworking shops, machine shops, and quality control departments where hole-diameter verification is required. It is suited for checking go or no-go conditions on features near the 0.566-inch nominal size. The minus tolerance grind means the gage diameter is at or below nominal, following standard Class ZZ minus practice. It is commonly used alongside gage blocks, ring gages, and hand micrometers as part of a complete dimensional inspection routine in both production and tool-room environments.

Key Features

• Class ZZ minus tolerance grade for general-purpose shop and inspection use
• Nominal diameter of 0.566 inches for direct hole and bore verification
• Tolerance of 0.0002 inches (0.0002 mm) for reliable dimensional control
• Steel construction for durability and resistance to wear during repeated gauging cycles
• Single-piece pin format for straightforward go or no-go inspection procedures

Compatibility

Designed as an OEM-style replacement or direct-use pin gage compatible with standard gage handle holders accepting 0.566-inch diameter pins. Verify handle chuck range before installation.

Installation Notes

Pin gages are installed and used by machinists and quality control technicians. Clean the pin and the feature being checked before use to remove chips, coolant, and debris that could cause a false reading. Insert the pin with light hand pressure only — do not force or hammer the pin into a feature, as this can damage both the gage and the workpiece. Store pin gages in a protective case away from other tooling to prevent nicking or surface damage that would affect accuracy.