Spi 29-364-7 Class Zz Plus Plug Gage 0.364 in Dia

Product Description

The SPI 29-364-7 is a Class ZZ Plus plug gage designed for go/no-go inspection of bored, drilled, or reamed holes with a nominal diameter of 0.364 inches. Built to Class ZZ Plus tolerances of 0.0002 inches, it provides a reliable standard for verifying that hole dimensions fall within acceptable limits during production or incoming inspection. The gage body is steel construction, delivering the durability and wear resistance expected in machine shop and quality-control environments. Machinists, toolroom technicians, and QC inspectors use this type of gage as a fast, repeatable alternative to dial-bore or air-gage measurement for high-volume part checking.

This plug gage is suited for use in manufacturing, fabrication, and precision machining operations where hole-diameter verification is required. It is appropriate for both bench inspection and floor-level quality checks on steel, aluminum, and other workpiece materials. The 0.364-inch nominal size covers a range of drilled or reamed hole applications common in general machining, tooling, and mechanical assembly workflows.

Key Features

• Class ZZ Plus tolerance rating of 0.0002 inches for precise go/no-go inspection
• Nominal measurement diameter of 0.364 inches
• Steel construction for wear resistance and dimensional stability
• Single-piece gage format suited for fast, repeatable hole checking
• Compact and lightweight at 0.2 pounds for easy bench or floor use

Compatibility

Designed as an OEM-style precision inspection gage for verifying hole diameters of 0.364 inches in general machining and quality-control applications. No specific machine or system compatibility was provided by the manufacturer.

Installation Notes

Plug gages are handled and used by machinists, toolroom personnel, and quality-control inspectors. Before use, ensure the workpiece hole and gage surfaces are clean and free of burrs, chips, or coolant residue, as contamination will produce false readings. Apply light, even hand pressure when inserting the gage — never force it, as forcing can damage the gage or the workpiece. Store in a protective case away from abrasive surfaces to preserve the calibrated diameter.