Spi 29-227-6 Class Zz Plus Plug Gage 0.227 in Dia

Product Description

The SPI 29-227-6 is a Class ZZ Plus plug gage used to verify bore and hole diameters to a precise measurement standard. It checks a nominal diameter of 0.227 inches with a tolerance of 0.0002 inches, making it suitable for quality control and inspection work where close-tolerance verification is required. Machined from steel, this go/no-go style gage is a standard tool for machinists, tool-and-die makers, and quality inspectors working in precision manufacturing environments.

This plug gage is used in machine shops, production floors, and inspection departments to verify drilled, reamed, or bored holes against a specified diameter. Class ZZ Plus gages are appropriate for general-purpose inspection of production parts where the hole tolerance allows for ZZ-class gage accuracy. The 0.227-inch size fits applications where that specific nominal bore diameter must be confirmed before assembly or further machining operations proceed.

Key Features

• Nominal measurement diameter of 0.227 inches
• Class ZZ Plus tolerance of 0.0002 inches for reliable go/no-go inspection
• Steel construction for durability in shop environments
• Compact and lightweight at 0.2 pounds for easy one-hand use
• Single-piece package quantity supports individual tooling purchases

Compatibility

Designed as a direct-use inspection gage for any application requiring verification of a 0.227-inch nominal bore diameter in accordance with Class ZZ Plus gage standards.

Installation Notes

Plug gages are installed by hand into the bore being inspected — no power tools or torque specifications apply. Clean the bore and gage surfaces before use to prevent false readings from chips or debris. Handle with care to avoid dropping, which can damage the gage surface and alter its accuracy. Periodic calibration against a certified master is recommended to maintain measurement integrity.