Spi 29-118-7 Class Zz Plus Plug Gage 0.118 Inch

Product Description

The SPI 29-118-7 is a Class ZZ Plus plug gage designed for precision dimensional inspection of small-diameter holes and bores. It measures hole diameters of 0.118 inches with a tolerance of 0.0002 inches, making it suited for applications where tight dimensional control is required. Constructed from steel for durability and wear resistance, this plug gage is a standard go/no-go inspection tool used by machinists, quality control technicians, and precision manufacturing professionals to verify that drilled, reamed, or bored holes conform to specification.

This plug gage is used in machine shops, precision manufacturing facilities, and quality inspection departments. It is appropriate for production-line inspection, incoming material verification, and toolroom use. The 0.118 inch nominal diameter makes it suitable for checking small bores in components such as valve bodies, hydraulic fittings, precision housings, and similar machined parts where close-tolerance hole sizing is critical.

Key Features

• Class ZZ Plus tolerance rating for precise go/no-go inspection
• 0.118 inch nominal measurement diameter
• 0.0002 inch tolerance for tight dimensional control
• Steel construction for wear resistance and long service life
• Single-piece unit packaged individually for direct use out of box

Compatibility

Designed as a standard Class ZZ Plus plug gage for inspecting drilled, reamed, or bored holes nominally sized at 0.118 inches in machined components and assemblies.

Installation Notes

Plug gages are handled and used by machinists and quality inspection personnel, not installed into systems. Before use, clean the gage and the bore being inspected to remove chips, coolant, or debris that could affect measurement accuracy. Do not force the gage into an undersized bore, as this can damage the gage land and compromise calibration. Store the gage in a protective case away from moisture to prevent corrosion and dimensional drift.