Spi 29-930-5 Class Zz Plus Plug Gage 0.93 in

Product Description

The SPI 29-930-5 is a Class ZZ Plus plug gage designed for precision bore and hole measurement in machining, manufacturing, and quality control applications. Built to Class ZZ Plus tolerances, this plug gage measures at a nominal diameter of 0.93 inches with a tolerance of 0.0002 inches, making it suitable for go/no-go inspection workflows where dimensional accuracy is critical. The gage body is constructed from steel for durability and dimensional stability under repeated use. At 0.2 pounds, it is a lightweight, hand-held instrument suited for bench or floor-level inspection work.

This plug gage is used in dimensional inspection of machined bores, drilled holes, and reamed features where tight tolerances must be verified. It is appropriate for use in production environments, machine shops, and quality assurance labs. Technicians and quality control inspectors use this type of gage to confirm that a bore meets specified diameter limits before a part advances in the production process. It is well-suited for both high-volume production inspection and low-volume precision work.

Key Features

• Class ZZ Plus tolerance rating for precision dimensional inspection
• Nominal measurement diameter of 0.93 inches
• Tolerance of 0.0002 inches for tight go/no-go verification
• Steel construction for durability and dimensional stability
• Lightweight at 0.2 pounds for comfortable hand-held use

Compatibility

Designed as a standard Class ZZ Plus plug gage for use in general dimensional inspection of machined bores and holes at a nominal diameter of 0.93 inches.

Installation Notes

Plug gages should be handled by a trained metrology technician or quality control inspector. Before use, clean the gage and the bore being inspected to remove debris, cutting fluid, or burrs that could affect measurement accuracy. Store the gage in a protective case away from temperature extremes to maintain calibration. Do not force the gage into an undersized bore, as this can damage the gage surface and compromise accuracy.