Spi 29-014-8 Class Zz Plus Plug Gage 0.014 in

Product Description

The SPI 29-014-8 is a Class ZZ Plus precision plug gage designed for verifying small bore diameters in production inspection and quality control environments. It measures a nominal diameter of 0.014 inches with a tolerance of 0.0002 inches, making it suitable for tight-tolerance hole verification in precision machined components. Constructed from steel for durability and dimensional stability, this plug gage is a go/no-go style tool used by machinists, quality inspectors, and toolroom professionals to confirm hole size acceptance during or after machining operations.

This gage is intended for use in production floor inspection, toolroom verification, and incoming quality control settings where small-diameter bore measurement is required. It is appropriate for applications in aerospace, medical device manufacturing, automotive, and general precision machining where hole tolerances are critical and consistent part acceptance criteria must be enforced. The compact size of the 29-014-8 makes it well suited for verifying very small diameter bores that larger gaging tools cannot access.

Key Features

• Nominal measurement diameter of 0.014 inches for very small bore inspection
• Class ZZ Plus tolerance rating of 0.0002 inches for precision go/no-go verification
• Steel construction for dimensional stability and resistance to wear
• Compact form factor suited to tight or restricted bore access
• Single-piece packaging for individual replacement or kit supplementation

Compatibility

Designed as an OEM-style precision plug gage for use with standard gage handle sets that accept pin-style plug gage blanks of the appropriate diameter class.

Installation Notes

Plug gages should be handled by qualified machinists or quality control technicians trained in precision measurement practices. Store the gage in its protective case when not in use to prevent nicks, corrosion, or dimensional damage. Clean both the gage and the bore being measured before use to ensure accurate readings and prevent premature wear. Do not force the gage into a bore; excessive insertion force can damage the gage or the workpiece and will produce unreliable results.