Spi 29-248-2 Class Zz Plus Plug Gage 0.248 in Diameter

Product Description

The SPI 29-248-2 is a Class ZZ Plus plug gage designed for checking hole diameters to a nominal size of 0.248 inches with a tolerance of 0.0002 inches. Plug gages of this class are used in go/no-go inspection workflows to verify that drilled, reamed, or bored holes fall within acceptable dimensional limits. The gage body is constructed of steel for durability under repeated use in shop-floor conditions. Machinists, quality control technicians, and precision tooling professionals rely on Class ZZ Plus gages for production inspection and incoming-material verification.

This gage is suited for dimensional inspection in manufacturing, toolroom, and machine shop environments where hole tolerances must be held to close limits. It is appropriate for use in both light production runs and bench inspection settings. The 0.248-inch nominal diameter makes it a direct fit for inspection of holes produced by standard drill and reamer sizes in that range. Individual packaging at a quantity of one makes it easy to add to an existing gage set or replace a worn member.

Key Features

• Nominal measurement diameter of 0.248 inches for precise hole inspection
• Class ZZ Plus tolerance of 0.0002 inches for reliable go/no-go verification
• Steel construction resists wear during repeated use
• Compact and lightweight at 0.2 pounds for easy bench or portable use
• Single-piece packaging simplifies procurement for individual replacements

Compatibility

Designed as an OEM-style replacement or direct-use Class ZZ Plus plug gage for standard 0.248-inch nominal diameter hole inspection applications in general machining and quality assurance environments.

Installation Notes

Plug gages are handled and used by machinists and quality technicians and require no installation in the traditional sense. Before use, clean the gage and the workpiece bore with a lint-free cloth to remove chips, oil, and debris that could affect measurement accuracy. Do not force the gage into an undersized hole, as this can damage the gage surface and compromise tolerance integrity. Store the gage in a protective case or designated holder to prevent surface damage between uses.