Spi 29-633-5 Class Zz Plus Plug Gage 0.633 in

Product Description

The SPI 29-633-5 is a Class ZZ Plus plug gage designed for go/no-go inspection of 0.633-inch diameter bores and holes. Machined from steel, this fixed-limit gage gives machinists and quality control technicians a fast, reliable method for verifying that a hole falls within tolerance without the setup time required for indicating or air gages. The 29-633-5 holds a tolerance of 0.0002 inches, which is consistent with Class ZZ Plus specifications for production inspection work. It is a single-piece inspection tool suited for shop floor and receiving inspection environments.

This plug gage is used in manufacturing, machining, and precision fabrication settings where hole diameter verification is part of the quality process. Typical applications include checking drilled, reamed, or bored holes in metal components during production runs or incoming inspection. It is appropriate for both job shop and production floor use where repeatable, low-cost dimensional verification is required.

Key Features

• Class ZZ Plus tolerance grade — 0.0002 inches for reliable production inspection
• 0.633-inch nominal diameter measurement range
• Steel construction for durability and dimensional stability
• Fixed-limit design allows fast go/no-go checks without instrument setup
• Compact single-piece format suits bench, floor, and receiving inspection use

Compatibility

Designed as a fixed-limit plug gage for inspecting bores and holes with a nominal diameter of 0.633 inches in accordance with Class ZZ Plus gage tolerancing standards.

Installation Notes

Plug gages are handled and applied by machinists, quality technicians, or inspection personnel — no installation in the traditional sense is required. Keep the gage clean and lightly oiled when not in use to prevent corrosion and protect the precision ground surfaces. Never force the gage into a hole; doing so can damage both the gage and the workpiece and will produce unreliable results. Verify gage calibration status before use in critical inspection applications, and store in a protective case away from abrasive contaminants.