Spi 19-597-4 Class Zz Minus Plug Pin Gage 0.597 in

Product Description

The SPI 19-597-4 is a Class ZZ minus plug pin gage with a nominal diameter of 0.597 inches, manufactured from steel. Pin gages of this type are used to verify hole diameters and bore dimensions to a precise tolerance standard. The Class ZZ designation indicates a minus tolerance of 0.0002 inches, meaning the gage is ground to the lower boundary of the nominal size. Machinists, tool and die technicians, and quality control inspectors use plug gages as a fast, reliable go/no-go check during production and incoming inspection work.

This gage is suited for dimensional inspection in machining, fabrication, and assembly environments where hole size verification is part of the quality process. The 0.597-inch nominal size covers a range of drilled, reamed, or bored features in both ferrous and non-ferrous workpieces. The single-piece steel construction keeps handling weight low and provides consistent performance across repeated insertions. It is well suited for shop floor use and inspection room applications alike.

Key Features

• Class ZZ minus tolerance of 0.0002 inches for lower-boundary hole verification
• Nominal diameter of 0.597 inches for precise bore and hole checking
• Steel construction for durability and dimensional stability under repeated use
• Lightweight at 0.2 pounds for easy single-hand operation
• Single-piece gage format supports fast go/no-go inspection workflows

Compatibility

Designed as a standard Class ZZ minus plug pin gage for use with any inspection fixture, gage block set, or handle holder accepting 0.597-inch diameter plug gages.

Installation Notes

Plug pin gages are used by quality control technicians and machinists and require no permanent installation. Before use, clean both the gage and the feature being checked to remove chips, coolant, and debris that could affect the reading. Apply light gage oil when inserting the pin to reduce wear on the gage surface. Store the gage in a protective case away from sources of impact and temperature variation to maintain calibration integrity.