Spi 19-560-2 Class Zz Minus Plug Pin Gage 0.56 in

Product Description

The SPI 19-560-2 is a Class ZZ minus plug pin gage used to verify bore and hole dimensions in precision machining and inspection work. It measures 0.56 inches in diameter and is manufactured from steel for durability through repeated use. The minus designation means the gage is ground to the low side of the nominal dimension, following standard go/no-go inspection practice. With a tolerance of 0.0002 inches, it is suited for general-purpose dimensional inspection where high repeatability and consistent measurements are required. Machinists, quality control technicians, and toolroom personnel rely on this type of gage as part of routine in-process and final inspection workflows.

This plug pin gage is used in machine shops, manufacturing facilities, and quality inspection environments where bore size verification is part of production or incoming inspection. It is appropriate for checking drilled, reamed, or bored holes at the 0.56-inch nominal size. The steel construction holds up well in typical shop environments. It is suited for use as a go gage member in a go/no-go inspection setup or as a standalone check gage for dimensional verification.

Key Features

• Class ZZ accuracy grade for general-purpose plug gage inspection
• Minus tolerance ground to the low side of the 0.56-inch nominal diameter
• Tolerance of 0.0002 inches for consistent, repeatable measurements
• Steel construction for shop durability and resistance to wear
• Compact and lightweight at 0.2 pounds for easy single-handed use

Compatibility

Designed as a general-purpose Class ZZ minus plug pin gage for use in standard go/no-go inspection setups at a 0.56-inch nominal bore diameter.

Installation Notes

Plug pin gages are handled and used by machinists and quality inspection personnel, not installed in the traditional sense. Before use, clean both the gage and the bore being checked to remove chips, coolant, and debris that could cause false readings or damage the gage surface. Handle the gage with care to avoid dropping or striking it, as impact can alter the ground diameter and invalidate calibration. Periodic recalibration against a certified master is recommended to maintain measurement integrity over time.