Spi 29-543-6 Class Zz Plus Plug Gage 0.543 Inch

Product Description

The SPI 29-543-6 is a Class ZZ Plus plug gage designed for go/no-go dimensional inspection of 0.543-inch diameter bores and holes. Built from steel, this fixed-limit gage delivers a tolerance of 0.0002 inches, making it suitable for quality control checks in precision machining, manufacturing, and fabrication environments. Machinists, quality technicians, and tool-and-die professionals use plug gages like this one to verify that drilled, reamed, or bored features fall within specified dimensional limits. The Class ZZ Plus designation indicates a tolerance grade appropriate for general inspection work where consistent, repeatable measurements are required.

This plug gage is used in shop-floor and inspection-room settings where hole diameter conformance must be verified quickly and without complex setup. It is well suited for production inspection of machined parts, castings, and fabricated components where 0.543-inch diameter features are present. The compact form factor and straightforward operation make it a practical tool for incoming inspection, in-process checks, and final part verification across metalworking and manufacturing operations.

Key Features

• Class ZZ Plus tolerance grade for general-purpose hole inspection
• 0.543-inch nominal diameter measurement range
• 0.0002-inch tolerance for consistent dimensional verification
• Steel construction for durability in production environments
• Fixed-limit design enables fast go/no-go inspection without adjustment

Compatibility

Designed as an OEM-style fixed-limit plug gage for verifying 0.543-inch diameter bores in general machining and manufacturing inspection applications.

Installation Notes

Plug gages are handled and used by machinists and quality control technicians. Clean the gage and the bore being checked before use to prevent debris from affecting readings. Store the gage in its protective case when not in use to preserve the precision ground surfaces. Do not force the gage into a bore, as this can damage the gage or the workpiece and produce inaccurate results.