Spi 29-432-2 Class Zz Plus Plug Gage 0.432 in Dia

Product Description

The SPI 29-432-2 is a Class ZZ Plus plug gage designed for precision bore and hole measurement in machining and quality-control applications. Built to Class ZZ Plus tolerances of 0.0002 inches, this gage provides reliable go/no-go verification for holes with a nominal diameter of 0.432 inches. The steel construction ensures dimensional stability under typical shop floor conditions. Machinists, tool-and-die technicians, and QC inspectors use plug gages like this one to confirm that drilled, reamed, or bored holes fall within specified tolerances before parts move to the next stage of production.

This gage is suited for use in precision manufacturing environments where hole diameter verification is part of standard inspection procedure. It is commonly used on production lines, at inspection stations, and during first-article inspection of machined components. The 0.432-inch nominal diameter targets a specific hole size common in mechanical and industrial assemblies. The compact, single-piece format makes it easy to integrate into existing gage storage and calibration systems.

Key Features

• Class ZZ Plus tolerance of 0.0002 inches for precision go/no-go inspection
• Nominal measurement diameter of 0.432 inches
• Steel construction for dimensional stability and durability in shop environments
• Compact single-piece form factor suits bench, line, and field inspection use
• Individual unit packaging supports controlled gage crib and calibration tracking

Compatibility

Designed as a standard Class ZZ Plus plug gage for go/no-go hole inspection of 0.432-inch nominal diameter bores in machined parts and assemblies.

Installation Notes

Plug gages are handled and used by machinists, quality technicians, and metrologists — no permanent installation is required. Keep the gage clean and lightly oiled when not in use to prevent corrosion on the steel surface. Do not force the gage into a hole; if resistance is felt, the bore is undersized and should be returned for rework. Periodic recalibration against traceable standards is recommended to maintain measurement integrity.