Spi 29-435-5 Class Zz Plus Plug Gage 0.435 in Steel

Product Description

The SPI 29-435-5 is a Class ZZ Plus plug gage machined from steel, used to verify bore and hole diameters to a nominal size of 0.435 inches. It holds a tolerance of 0.0002 inches, making it suitable for go/no-go inspection work in manufacturing, machine shops, and precision fabrication environments. Class ZZ gages are the standard working-grade inspection tool for checking hole acceptance in production settings. Machinists, quality control technicians, and tooling specialists rely on this gage to confirm that drilled, reamed, or bored holes fall within specified dimensional limits before assembly or further processing.

This plug gage is used in production inspection and incoming quality control wherever hole diameter verification is required. It fits into workflows involving ferrous and non-ferrous workpieces where a 0.435-inch nominal bore must be confirmed. It is equally applicable in job shop environments and in-line QC stations. The steel construction provides durability under repeated insertion cycles typical of high-volume inspection use.

Key Features

• Nominal diameter of 0.435 inches for direct go/no-go hole inspection
• Tolerance of 0.0002 inches meets Class ZZ Plus accuracy requirements
• Steel construction for wear resistance and dimensional stability
• Compact and lightweight at 0.2 pounds for easy bench or portable use
• Single-piece package quantity suits individual tooling replenishment

Compatibility

Designed as a working-grade Class ZZ Plus plug gage for standard go/no-go hole inspection at a nominal bore diameter of 0.435 inches in general machining and quality control applications.

Installation Notes

Plug gages are handled and used by machinists and QC technicians — no installation in the traditional sense applies. Clean the gage and the bore being checked before use to avoid false readings from chips or coolant. Store the gage in a protective case away from abrasive surfaces to preserve the ground diameter. Follow ASME B89.1.5 handling and calibration practices for maintaining gage accuracy over time.