Spi 29-091-6 Class Zz Plus Plug Gage 0.091 in

Product Description

The SPI 29-091-6 is a Class ZZ Plus plug gage used to verify the diameter of holes and bores to tight dimensional tolerances. It measures a nominal diameter of 0.091 inches with a tolerance of 0.0002 inches, making it suitable for precision inspection work in manufacturing, machining, and quality control environments. Constructed from steel, this gage is designed for repeated use in shop-floor and lab settings. Machinists, QC inspectors, and toolroom professionals rely on plug gages like this one to confirm that drilled, reamed, or bored holes meet specified dimensional requirements before parts advance to the next stage of production.

This plug gage is used in applications where precise hole diameter verification is required. Class ZZ Plus gages are commonly used for production inspection of go/no-go dimensional checks on small-diameter holes. The 0.091-inch size is typical in precision machined components, instrument bodies, and assemblies where tight bore tolerances are critical. It is appropriate for both shop-floor use and metrology lab environments where consistent, repeatable measurement is required.

Key Features

• Measures nominal hole diameter of 0.091 inches
• Class ZZ Plus tolerance rating of 0.0002 inches for precision inspection
• Steel construction for durability and dimensional stability
• Compact and lightweight at 0.2 pounds for easy handling
• Suitable for go/no-go production inspection workflows

Compatibility

Designed as a precision inspection tool for verifying 0.091-inch diameter holes and bores in machined components across general manufacturing and quality control applications.

Installation Notes

Plug gages are handled by machinists, toolroom technicians, and quality control inspectors. Clean both the gage and the workpiece bore before use to prevent debris from affecting measurement accuracy. Store the gage in a protective case away from temperature extremes to maintain dimensional stability. Follow ASME B89.1.5 or applicable inspection standards for proper gage use and calibration intervals.