Spi 29-302-7 Class Zz Plus Plug Gage 0.302 in Dia

Product Description

The SPI 29-302-7 is a Class ZZ Plus plug gage designed to verify the inside diameter of bored, drilled, or reamed holes to a nominal size of 0.302 inches. Built from steel, this go/no-go style precision tool checks whether a hole falls within acceptable tolerance limits, with a tolerance of 0.0002 inches. Machinists, toolmakers, and quality control technicians use plug gages during in-process and final inspection to confirm dimensional conformance. The ZZ classification indicates this gage meets industry-standard accuracy requirements for general-purpose inspection work in production and job-shop environments.

This gage is suited for inspection applications in machine shops, manufacturing facilities, and any setting requiring precise hole-size verification at 0.302 inches. It is appropriate for use on ferrous and non-ferrous workpieces where tight dimensional control is required. The compact, lightweight design at 0.2 pounds makes it easy to handle during repetitive inspection cycles. It is packaged individually and is ready for immediate use out of the box.

Key Features

• Nominal measurement diameter of 0.302 inches for precise hole verification
• Class ZZ Plus tolerance of 0.0002 inches meets standard inspection accuracy requirements
• Steel construction provides durability and resistance to wear during repeated use
• Lightweight at 0.2 pounds for comfortable single-hand operation
• Single-piece packaging keeps the gage protected and ready for use

Compatibility

Designed as a general-purpose Class ZZ Plus plug gage for inspection of holes with a nominal diameter of 0.302 inches in standard production and quality control applications.

Installation Notes

Plug gages are used by machinists and quality technicians and require no permanent installation. Clean the gage and the hole being checked before use to prevent debris from affecting the reading. Do not force the gage into a hole; if it does not pass through freely, the feature is out of tolerance. Store the gage in a protective case away from moisture and temperature extremes to preserve its calibration.