Spi 29-117-9 Class Zz Plus Plug Gage 0.117 in Dia

Product Description

The SPI 29-117-9 is a Class ZZ Plus plug gage designed to check hole diameters in precision machining and inspection applications. It measures a nominal diameter of 0.117 inches with a tolerance of 0.0002 inches, providing the tight dimensional control required for go/no-go verification work. Constructed from steel, this gage is built to withstand repeated use in shop and quality-control environments. Machinists, tool and die makers, and quality-assurance technicians use plug gages like this one to verify bore dimensions quickly and consistently without the need for complex measuring instruments.

This plug gage is suited for small-diameter bore inspection in precision manufacturing settings, including metal fabrication, tooling, and mechanical assembly operations. Its compact size and simple operation make it practical for inline inspection on the shop floor as well as bench-level quality checks. The Class ZZ Plus designation indicates a commercial-grade tolerance class appropriate for general-purpose inspection of production parts.

Key Features

• Nominal measurement diameter of 0.117 inches for small-bore inspection
• Tolerance of 0.0002 inches ensures precise go/no-go verification
• Steel construction for durability and dimensional stability under repeated use
• Class ZZ Plus tolerance class suited for general-purpose production inspection
• Compact single-piece design for fast, straightforward bore checking

Compatibility

Designed as a standard Class ZZ Plus plug gage for general-purpose inspection of 0.117-inch nominal diameter bores in production and quality-control applications.

Installation Notes

Plug gages are handled and used by machinists and quality-control inspectors and do not require installation in the traditional sense. Store the gage in a protective case when not in use to prevent damage to the precision-ground surfaces. Clean the gage and the bore being checked before use to ensure accurate measurement readings. Avoid dropping or mishandling the gage, as impact damage can alter the ground diameter and invalidate measurements.