Spi 19-296-3 Class Zz Minus Plug Pin Gage 0.296 in

Product Description

The SPI 19-296-3 is a Class ZZ minus plug pin gage designed to verify bore and hole diameters to precise dimensional tolerances. This gage measures 0.296 inches in diameter and is manufactured from steel for consistent hardness and wear resistance. It holds a tolerance of 0.0002 inches, making it suitable for go/no-go inspection workflows in machining, fabrication, and quality control environments. Machinists, toolmakers, and QC inspectors rely on plug pin gages like this one to confirm that drilled, reamed, or bored features fall within acceptable limits before parts advance through production.

The 19-296-3 is used in production inspection, incoming material verification, and toolroom applications where dimensional accuracy must be confirmed quickly and reliably. Class ZZ gages are the standard inspection-grade option for commercial tolerancing work. This plug gage is appropriate for use at machine shops, job shops, and manufacturing facilities performing general-purpose hole verification on metal and non-metal workpieces.

Key Features

• Class ZZ minus tolerance classification for standard commercial inspection use
• 0.296 inches nominal diameter for precise bore verification
• 0.0002 inches dimensional tolerance for reliable go/no-go gauging
• Steel construction provides durability and resistance to wear during repeated use
• Compact, single-piece design integrates with standard pin gage handle sets

Compatibility

Designed as an OEM-style replacement or direct addition to standard plug pin gage sets used in general-purpose bore inspection applications.

Installation Notes

Plug pin gages are installed and used by machinists, toolmakers, and quality control technicians. Before use, clean both the gage and the workpiece bore with a lint-free cloth to remove debris, oil, or chips that could affect measurement accuracy. Insert the gage with light, consistent hand pressure only — never force a pin gage into a bore. Store gages in a protective case away from other metal tools to prevent nicking or surface damage that would compromise tolerance accuracy.