Spi 29-112-0 Class Zz Plus Plug Gage 0.112 Inch

Product Description

The SPI 29-112-0 is a Class ZZ Plus plug gage designed to verify bore and hole diameters to a nominal size of 0.112 inches with a tolerance of 0.0002 inches. Built from steel, this go/no-go style precision gage gives machinists and quality-control technicians a fast, reliable method for confirming that drilled, reamed, or bored holes meet tight dimensional specifications. It is a single-piece instrument used in production inspection, tool and die work, and general metrology applications where consistent, repeatable measurement is required.

Class ZZ Plus plug gages are suited for moderate-tolerance production inspection environments. This gage is appropriate for use on metal, plastic, and composite workpieces wherever a 0.112-inch nominal bore must be verified. It is commonly found on shop floors, inspection benches, and in toolrooms supporting both manual machining and CNC production lines. The compact size and light weight make it easy to handle during high-volume part inspection.

Key Features

• Nominal measurement diameter of 0.112 inches for precise bore verification
• Class ZZ Plus tolerance rating of 0.0002 inches ensures repeatable inspection accuracy
• Steel construction for durability and wear resistance in production environments
• Single-piece design simplifies handling and storage on the inspection bench
• Lightweight at 0.2 pounds, suitable for continuous use during high-volume inspection

Compatibility

Designed as a standard Class ZZ Plus plug gage for dimensional inspection of 0.112-inch nominal diameter bores and holes across a wide range of machined components and materials.

Installation Notes

Plug gages are used by machinists, quality technicians, and toolroom personnel — no installation in a mechanical system is required. Before use, clean the gage and the bore being checked to remove chips, coolant, and debris that could affect measurement accuracy. Apply light gage oil or a clean, lint-free cloth to protect the gage surface and extend wear life. Store in a protective case away from temperature extremes to preserve calibration integrity.