Spi 29-662-4 Class Zz Plus Plug Gage 0.662 in Dia

Product Description

The SPI 29-662-4 is a Class ZZ Plus plug gage designed to verify that a hole or bore meets a specified go/no-go dimensional tolerance. Measuring 0.662 inches in diameter with a tolerance of 0.0002 inches, this plug gage gives machinists, quality technicians, and tool room inspectors a fast, reliable method for confirming bore size on the shop floor or inspection bench. The steel construction provides the hardness and wear resistance needed for repeated use in production and inspection environments. Class ZZ Plus designates a commercial-grade tolerance class suitable for inspection of general-purpose manufactured parts.

This plug gage is used in manufacturing, machining, and quality assurance applications where hole diameter conformance must be verified quickly and accurately. It is well suited for incoming inspection, in-process checks, and final verification of bored, drilled, or reamed holes at or near 0.662 inches in diameter. Quality inspectors and machinists in job shops, production facilities, and toolrooms routinely use plug gages of this type to ensure parts meet print specifications without requiring more complex measurement setups.

Key Features

• 0.662-inch nominal diameter for precise bore inspection at that dimension
• 0.0002-inch tolerance meets Class ZZ Plus requirements for commercial inspection use
• Steel construction delivers hardness and durability for repeated gauging cycles
• Compact and lightweight at 0.2 pounds for easy single-hand use at the machine or bench
• Single-piece packaging supports individual replacement or supplemental stock

Compatibility

Designed as an OEM-style replacement or supplemental plug gage for general-purpose bore inspection applications requiring a 0.662-inch Class ZZ Plus go/no-go check.

Installation Notes

Plug gages are used by quality technicians and machinists and require no power source or installation tools. Before use, clean the gage and the bore being checked to remove chips, coolant, and debris that could affect the reading. Apply light gaging oil if recommended by your inspection procedure to reduce wear on the gage land. Store the gage in its case when not in use to protect the precision-ground surface from damage or corrosion.