Spi 29-523-8 Class Zz Plus Plug Gage 0.523 in

Product Description

The SPI 29-523-8 is a Class ZZ Plus plug gage designed to verify the dimensional accuracy of bored, drilled, or reamed holes at a nominal diameter of 0.523 inches. Built from steel, it provides a reliable no-go or go reference for inspectors, machinists, and quality control technicians working to tight tolerances. The gage holds a tolerance of 0.0002 inches, making it appropriate for moderate-precision inspection work where consistent, repeatable measurements are required. This is a single-piece gage sold individually and is a standard tool in metrology and production floor inspection workflows.

This plug gage is used in manufacturing, machining, and quality assurance environments where hole diameter verification is part of standard inspection protocol. It is suited for incoming inspection, in-process checks, and final acceptance testing on machined components. Class ZZ Plus gages are typically used for less critical fits or for checking softer materials where gage wear is reduced. Machinists, quality technicians, and tool room personnel are the primary users of this type of instrument.

Key Features

• Nominal measurement diameter of 0.523 inches for precise hole inspection
• Tolerance of 0.0002 inches ensures repeatable Class ZZ Plus accuracy
• Steel construction for durability in production and inspection environments
• Single-piece design for straightforward go or no-go inspection tasks
• Compact and lightweight at 0.2 pounds for easy handling at the inspection station

Compatibility

Designed as a standard Class ZZ Plus plug gage for verifying hole diameters of 0.523 inches in machined or fabricated components across general manufacturing and quality control applications.

Installation Notes

Plug gages should be handled and stored carefully to prevent surface damage that could affect accuracy. Clean the gage and the hole being inspected before use to remove chips, coolant, or debris. Do not force the gage into a hole; excessive insertion force can damage the gage or the workpiece and compromise measurement integrity. Periodic calibration against certified reference standards is recommended to maintain traceable accuracy.